| Reference number | Title | Date |
| MM/16/53 | Letter from Oliver Heaviside, Newton Abbott, to GH Darwin | 28 February 1898 |
| MM/15/49 | Report by GH Darwin on a paper by FC Penrose on the orientation of a number of Greek temples | 4 March 1897 |
| MM/17/85 | Letter from GH Darwin to Lord Rayleigh | 27 October 1892 |
| MS/769/24 | Letter from George Howard Darwin, Down, Beckenham, Kent, to Walter White | 17 June 1879 |
| MM/22/49 | Letter from Vito Volterra, Rome, to Sir George Darwin | 4 April 1903 |
| MM/22/48 | Letter from Vito Volterra, Via in Lucina 17, Rome, to Sir George Darwin | 17 February 1903 |
| NLB/34/118 | Copy letter from Robert William Frederick Harrison, to Sir George [Howard] Darwin, Fellow of the Royal Society | 30 November 1906 |
| IM/Maull/001067 | Darwin, Sir George Howard | nd |
| NLB/16/640 | Copy letter from Arthur William Rucker, to Professor G H Darwin, Fellow of the Royal Society | 10 May 1898 |
| NLB/2/539 | Copy letter from Herbert Rix, to Professor George Howard Darwin, Fellow of the Royal Society | 28 July 1888 |
| NLB/2/224 | Copy letter from Herbert Rix, to Professor George Howard Darwin, Newnham Grange, Cambridge | 5 March 1888 |
| NLB/1/649 | Copy letter from Herbert Rix, to Professor George Howard Darwin, Fellow of the Royal Society | 20 October 1887 |
| NLB/4/128 | Copy letter from Herbert Rix, to Professor George Howard Darwin, Fellow of the Royal Society | 18 February 1890 |
| NLB/2/519 | Copy letter from an unknown correspondent, to Harrison & Sons | 26 July 1888 |
| NLB/4/560 | Copy letter from Herbert Rix, to Professor George Howard Darwin, Fellow of the Royal Society | 9 July 1890 |
| NLB/3/60 | Copy letter from Herbert Rix, to Professor George Howard Darwin, Newnham Grange, Cambridge | 26 February 1889 |
| NLB/3/457 | Copy letter from Herbert Rix, to Professor George Howard Darwin, Fellow of the Royal Society | 15 June 1889 |
| NLB/4/876 | Copy letter from Herbert Rix, to George Howard Darwin | 18 November 1890 |
| NLB/3/464 | Copy letter from Herbert Rix, to Professor George Howard Darwin, Fellow of the Royal Society | 17 June 1889 |
| NLB/5/18 | Copy letter from Herbert Rix, to Professor George Howard Darwin, Fellow of the Royal Society | 19 February 1891 |
| NLB/3/1076 | Copy letter from Herbert Rix, to Professor George Howard Darwin, Fellow of the Royal Society | 6 January 1890 |
| NLB/6/1196 | Copy letter from Herbert Rix, to Professor George Howard Darwin, Fellow of the Royal Society | 9 November 1892 |
| NLB/7/28 | Copy letter from Herbert Rix, to Professor Michael Foster | 14 November 1892 |
| NLB/7/48 | Copy letter from Herbert Rix, to Professor George Howard Darwin, Fellow of the Royal Society | 17 November 1892 |
| NLB/7/98 | Copy letter from Archibald Geikie, to the Rector, University of Padua | 30 November 1892 |
| NLB/7/797 | Copy letter from Herbert Rix, to Professor George Howard Darwin, Fellow of the Royal Society | [April 1893] |
| NLB/10/103 | Copy letter from Herbert Rix, to Professor George Howard Darwin, Fellow of the Royal Society | 1 October 1894 |
| NLB/10/604 | Copy letter from Herbert Rix, to Professor George Howard Darwin, Fellow of the Royal Society | 2 January 1895 |
| NLB/8/781 | Copy letter from Herbert Rix, to Professor George Howard Darwin, Fellow of the Royal Society | 22 December 1893 |
| NLB/10/774 | Copy letter from Herbert Rix, to Professor George Howard Darwin, Fellow of the Royal Society | 4 February 1895 |
| NLB/14/595 | Copy letter from Robert William Frederick Harrison, to Professor George Howard Darwin, Fellow of the Royal Society | 5 April 1897 |
| NLB/8/1063 | Copy letter from Herbert Rix, to Professor George Howard Darwin, Fellow of the Royal Society | 19 February 1894 |
| NLB/8/1109 | Copy letter from Herbert Rix, to Professor George Howard Darwin, Fellow of the Royal Society | 27 February 1894 |
| NLB/10/964 | Copy letter from Michael Foster, to Professor George Howard Darwin, Fellow of the Royal Society | 15 March 1895 |
| NLB/11/231 | Copy letter from Herbert Rix, to Professor George Howard Darwin, Fellow of the Royal Society | 17 May 1895 |
| NLB/9/796 | Copy letter from Herbert Rix, to Professor George Howard Darwin, Fellow of the Royal Society | 13 July 1894 |
| NLB/12/521 | Copy letter from an unknown correspondent, to Professor George Howard Darwin, Fellow of the Royal Society, Newnham Grange, Cambridge | 6 March 1896 |
| NLB/13/45 | Copy letter from Robert William Frederick Harrison, to Professor George Howard Darwin, Fellow of the Royal Society, Chairman of the Mathematical Committee | 1 June 1896 |
| NLB/13/219 | Copy letter from Robert William Frederick Harrison, to Professor George Howard Darwin, Fellow of the Royal Society, Chairman of the Mathematical Society | 6 July 1896 |
| NLB/16/233 | Copy letter from Robert William Frederick Harrison, to Professor G H Darwin, Fellow of the Royal Society, Newnham Grange, Cambridge | 28 February 1898 |
| NLB/13/515 | Copy letter from Robert William Frederick Harrison, to Professor George Howard Darwin, Fellow of the Royal Society, Chairman of the Sectional Committee on Mathematics | 2 October 1896 |
| NLB/12/477 | Copy letter from Herbert Rix, to Professor George Howard Darwin, Fellow of the Royal Society | 25 February 1896 |
| NLB/13/543 | Copy letter from Robert William Frederick Harrison, to Professor George Howard Darwin, Fellow of the Royal Society | 6 October 1896 |
| NLB/14/538 | Copy letter from Robert William Frederick Harrison, to Professor George Howard Darwin, Fellow of the Royal Society, Chairman of the Mathematics Committee | 25 March 1897 |
| NLB/14/565 | Copy letter from Robert William Frederick Harrison, to Professor George Howard Darwin, Fellow of the Royal Society, Chairman of the Mathematics Committee | 30 March 1897 |
| NLB/14/53 | Copy letter from Robert William Frederick Harrison, to Professor George Howard Darwin, Fellow of the Royal Society | 18 December 1896 |
| NLB/12/112 | Copy letter from Herbert Rix, to the Director, Science Museum/ South Kensington Museum, South Kensingon, S.W. | 9 December 1895 |
| NLB/14/60 | Copy letter from Robert William Frederick Harrison, to Professor George Howard Darwin, Fellow of the Royal Society | 19 December 1896 |
| NLB/14/484 | Copy letter from Arthur William Rucker, to George Howard Darwin, [Fellow of the Royal Society] | 18 March 1897 |
| RR/13/52a | Referee's report by George Howard Darwin, on a paper 'On lunar periodicities in earthquake frequency' by Cargill Gilston Knott | 23 November 1896 |
| RR/16/293 | Referee's report by Joseph Larmor, on a paper 'Le sage's theory of gravitation and the repulsion of light' by Professor George Howard Darwin | May 1905 |
| RR/15/176 | Second referee's report by William Mitchinson Hicks, on a paper 'The pear shaped and other figures of equilibrium of a rotating mass of liquid' by George Howard Darwin | October 1901 |
| RR/15/172 | Referee's report by Edward John Routh, on a paper 'Ellipsoidal harmonic analysis' by George Howard Darwin | May 1901 |
| RR/15/238 | Referee's report by George Howard Darwin, on a paper 'Sur la stabilite de l'equilibre des figures pyriformes affectees par une masse fluide en rotation' by Jules Henri Poincare | November 1901 |
| RR/15/175 | Memoranda from Robert William Frederick Harrison, and reply from Andrew Russell Forsyth, on a paper 'The pear shaped and other figures of equilibrium of a rotating mass of liquid' by George Howard Darwin | 21 October 1901 |
| RR/15/231 | Referee's report by George Howard Darwin, on a paper 'Some additional notes on the orientation of Greek temples being the result of a journey to Greece & Sicily in April & May, 1900' by Francis Cranmer Penrose | 1 February 1901 |
| RR/15/352 | Letter from George Howard Darwin, on a paper 'The equilibrium of rotating liquid cylinders' by James Hopwood Jeans to Joseph Larmor | 5 March 1902 |
| RR/15/228 | Referee's report by George Howard Darwin, on a paper 'Mathematical contributions to the theory of evolution. X. Supplement to a memoir on skew variation' by Karl Pearson | 5 June 1901 |
| RR/15/229 | Referee's report by George Howard Darwin and abstract proof of a paper 'Mathematical contributions to the theory of evolution. XI. On the influence of natural selection on the variability and correlation of organs' by Karl Pearson | 27 January 1902 |
| NLB/14/421 | Copy letter from Robert William Frederick Harrison, to Professor George Howard Darwin, Fellow of the Royal Society | 8 March 1897 |
| NLB/14/389 | Copy letter from Robert William Frederick Harrison, to Professor George Howard Darwin, Fellow of the Royal Society | [3 March 1897] |
| NLB/14/376 | Copy letter from Robert William Frederick Harrison, to Professor George Howard Darwin, Fellow of the Royal Society | 26 February 1897 |
| NLB/14/635 | Copy letter from Arthur William Rucker, to [George Howard] Darwin, [Fellow of the Royal Society] | 12 April 1897 |
| NLB/14/489 | Copy letter from Robert William Frederick Harrison, to Professor George Howard Darwin, Fellow of the Royal Society | 18 March 1897 |
| RR/16/38 | Referee's report by Hector Munro Macdonald, on a paper 'The integrals of the squares of ellipsoidal surface harmonic functions' by George Howard Darwin | 30 January 1904 |
| NLB/14/581 | Copy letter from Robert William Frederick Harrison, to Professor George Howard Darwin, Fellow of the Royal Society | 1 April 1897 |
| NLB/14/717 | Copy letter from Robert Frederick William Harrison, to Professor George Howard Darwin, Fellow of the Royal Society | 3 May 1897 |
| NLB/17 | New Letter Book volume 17, copy letters sent from Royal Society administration | 29 June 1898-20 December 1898 |
| NLB/15 | New Letter Book volume 15, copy letters sent from Royal Society administration | 3 June 1897-11 January 1898 |
| RR/15/354 | Letter from George Howard Darwin, on a paper 'On the vibrations and stability of a gravitating planet' by James Hopwood Jeans to Joseph Larmor | 7 November 1902 |
| NLB/14/622 | Copy letter from Arthur William Rucker, to Professor George Howard Darwin, Fellow of the Royal Society | 9 April 1897 |
| NLB/14/724 | Copy letter from Arthur William Rucker, to George Howard Darwin, [Fellow of the Royal Society] | 3 May 1897 |
| RR/16/37 | Referee's report by Ernest William Hobson, on a paper 'The integrals of the squares of ellipsoidal surface harmonic functions' by George Howard Darwin | 4 January 1904 |
| RR/15/381 | Referee's report by George Howard Darwin, on a paper 'Some definite integrals and a new method of reducing a function of spherical coordinates to a series of spherical harmonics' by Arthur Schuster | 15 June 1902 |
| RR/15/390 | Referee's report by George Howard Darwin, on a paper 'Celestial mechanics. Influence of definite meteoric showers' by C S Stromeyer | 20 December 1902 |
| RR/16/276 | Referee's report by George Howard Darwin, on a paper 'On the intensity & direction of the force of gravity in India' by Colonel Sidney Gerald Burrard | 29 March 1905 |
| NLB/15/9 | Copy letter from Robert William Frederick Harrison, to Professor George Howard Darwin | 4 June 1897 |
| RR/16/219 | Second referee's report by Horace Lamb, on a paper 'The seismic effect of tidal stresses' by Richard Dixon Oldham | 3 June 1904 |
| NLB/15/28 | Copy letter from Robert William Frederick Harrison, to Professor George Howard Darwin, Fellow of the Royal Society | 5 June 1897 |
| RR/17/150 | Referee's report by Augustus Edward Hough Love, on a paper 'Further consideration of the stability of the pear-shaped figure of a rotating mass of liquid' by George Howard Darwin | 18 November 1907 |
| NLB/15/169 | Copy letter from Robert William Frederick Harrison, to Professor George Howard Darwin, Fellow of the Royal Society | 8 July 1897 |
| NLB/15/152 | Copy letter from Robert William Frederick Harrison, to Professor George Howard Darwin, Fellow of the Royal Society | 7 July 1897 |
| NLB/16/222 | Copy letter from Robert William Frederick Harrison, to Professor G H Darwin, Fellow of the Royal Society | 23 February 1898 |
| NLB/15/228 | Copy letter from Robert William Frederick Harrison, to Professor Edward Albert Sharpey-Schafer, Professor George Howard Darwin, Professor Edwin Ray Lankester, Sir Archibald Geikie, William Turner Thiselton-Dyer, and Richard Tetley Glazebrook, Fellow of the Royal Society | 20 July 1897 |
| NLB/16/76 | Copy letter from Robert William Frederick Harrison, to Professor G H Darwin, Fellow of the Royal Society | 26 January 1898 |
| NLB/16/27 | Copy letter from Arthur William Rucker, to [Prof G H] Darwin | 14 January 1898 |
| NLB/16/177 | Copy letter from Theodeore E James, to Professor Darwin, [Fellow of the Royal Society], Newnham Grange, Cambridge | 16 February 1898 |
| NLB/16/63 | Copy letter from Robert William Frederick Harrison, to Professor Michael Foster [Fellow of the Royal Society] | 22 January 1898 |
| NLB/16/191 | Copy letter from Robert William Frederick Harrison, to the Secretary to H.M. Treasury, Whitehall, S.W. | 18 February 1898 |
| NLB/16/705 | Copy letter from Robert William Frederick Harrison, to Professor G H Darwin, Fellow of the Royal Society | 21 May 1898 |
| NLB/17/412 | Copy letter from Arthur William Rucker, to Professor George Howard Darwin, [Fellow of the Royal Society] | 25 October 1898 |
| NLB/16/306 | Copy letter from an unknown correspondent, to Professor G H Darwin, Fellow of the Royal Society, Newnham Grange, Cambridge | 12 March 1898 |
| NLB/15/833 | Copy letter from Arthur William Rucker, to George Howard Darwin, [Fellow of the Royal Society] | 20 December 1897 |
| NLB/15/673 | Copy letter from Arthur William Rucker, to Major Percy Alexander MacMahon, Fellow of the Royal Society | 15 November 1897 |
| NLB/15/645 | Copy letter from Robert William Frederick Harrison, to Professor George Howard Darwin, Captain William de Wiveleslie Abney, and Sir Joseph Norman Lockyer Fellow of the Royal Society | 11 November 1897 |
| NLB/16/550 | Copy letter from Robert William Frederick Harrison, to Professor G H Darwin, Fellow of the Royal Society | 27 April 1898 |
| NLB/16/677 | Copy letter from Robert William Frederick Harrison, to Professor G H Darwin, Fellow of the Royal Society | 19 May 1898 |
| NLB/17/23 | Copy letter from Robert William Frederick Harrison, to Professor George Howard Darwin, Fellow of the Royal Society, Chairman of the Mathematics Committee | 5 July 1898 |
| NLB/15/863 | Copy letter from Robert William Frederick Harrison, to Professor George Howard Darwin, Fellow of the Royal Society, Newnham College, Cambridge | 4 January 1898 |
| NLB/15/871 | Copy letter from Robert William Frederick Harrison, to George Howard Darwin, Fellow of the Royal Society | 5 January 1897 |
| NLB/17/50 | Copy letter from Robert William Frederick Harrison, to Professor George Howard Darwin, Dr Alexander Buchan, William Napier Shaw, Admiral Sir William James Lloyd Wharton, Fellows of the Royal Society | 8 July 1898 |
| NLB/17/217 | Copy letter from Theodore E James, to Professor George Howard Darwin, Fellow of the Royal Society | 6 September 1898 |
| NLB/17/122 | Copy letter from Robert William Frederick Harrison, to Professor George Howard Darwin | 20 July 1898 |
| NLB/17/353 | Copy letter from Robert William Frederick Harrison, to Professor George Howard Darwin, Fellow of the Royal Society | 17 October 1898 |
| NLB/17/359 | Copy letter from Robert William Frederick Harrison, to Professor George Howard Darwin, Fellow of the Royal Society, Chairman, Mathematics Committee | 18 October 1898 |
| NLB/17/530 | Copy letter from Arthur William Rucker, to Professor George Howard Darwin, [Fellow of the Royal Society] | 14 November 1898 |
| NLB/17/596 | Copy letter from Robert William Frederick Harrison, to Professor George Howard Darwin, Fellow of the Royal Society | 23 November 1898 |
| NLB/16/860 | Copy letter from Robert William Frederick Harrison, to Professor G H Darwin, Fellow of the Royal Society (Chairman of the Mathematical Committee) | 22 June 1898 |
| NLB/18/147 | Copy letter from Robert William Frederick Harrison, to Professor H E Armstrong, Fellow of the Royal Society | 24 January 1899 |
| NLB/17/571 | Copy letter from Arthur William Rucker, to George Henry Darwin, [Fellow of the Royal Society] | 20 November 1898 |
| NLB/18/13 | Copy letter from Robert William Frederick Harrison, to Professor G H Darwin, Fellow of the Royal Society | 22 December 1898 |
| NLB/19/115 | Copy letter from Arthur William Rucker, to Professor George Carey Foster, [Fellow of the Royal Society] | 26 June 1899 |
| NLB/18/146 | Copy letter from [Robert William Frederick Harrison], to Professor G H Darwin, Fellow of the Royal Society | 24 January 1899 |
| NLB/17/752 | Copy letter from Robert William Frederick Harrison, to Professor George Howard Darwin, Fellow of the Royal Society | 15 December 1898 |
| NLB/19/261 | Copy letter from Arthur William Rucker, to Professor George Howard Darwin, [Fellow of the Royal Society] | 21 July 1899 |
| NLB/18/155 | Copy letter from Robert William Frederick Harrison, to Professor G H Darwin, Fellow of the Royal Society | 25 January 1899 |
| NLB/23/2/216 | Copy letter from Joseph Larmor, to George Howard Darwin, Fellow of the Royal Society | 24 June 1902 |
| NLB/23/1/350 | Copy letter from Robert William Frederick Harrison, to Professor George Howard Darwin, Fellow of the Royal Society | 29 October 1901 |
| NLB/19/268 | Copy letter from Arthur William Rucker, to George Howard Darwin, [Fellow of the Royal Society] | 24 July 1899 |
| NLB/21/100 | Copy letter from Robert William Frederick Harrison, to Professor George Howard Darwin, Fellow of the Royal Society | 28 July 1900 |
| NLB/22/512 | Copy letter from Robert William Frederick Harrison, to Professor [George Howard] Darwin, Fellow of the Royal Society | 24 May 1901 |
| NLB/28/363 | Copy letter from Joseph Larmor, to Professor George Howard Darwin, Fellow of the Royal Society | February 1904 |
| NLB/20/346 | Copy letter from Robert William Frederick Harrison, to Professor George Howard Darwin, Fellow of the Royal Society | 30 March 1900 |
| NLB/20/233 | Copy letter from Robert William Frederick Harrison, to Professor George Howard Darwin, Fellow of the Royal Society | 2 March 1900 |
| NLB/18/686 | Copy letter from Arthur William Rucker, to [Professor G H] Darwin | 21 April 1899 |
| NLB/18/786 | Copy letter from Robert William Frederick Harrison, to Professor G H Darwin, Fellow of the Royal Society | 12 May 1899 |
| NLB/20/123 | Copy letter from Arthur William Rucker, to Andrew Russell Forsyth, [Fellow of the Royal Society] | 7 February 1900 |
| NLB/20/309 | Copy letter from Robert William Frederick Harrison, to Professor George Howard Darwin, [Fellow of the Royal Society] | 20 March 1900 |
| NLB/23/2/97 | Copy letter from Arthur William Rucker, to Professor George Howard Darwin, Fellow of the Royal Society | 25 June 1901 |
| NLB/20/320 | Copy letter from Robert William Frederick Harrison, to William E Darwin, Ridgmount, Basset, Southampton | 22 March 1900 |
| NLB/22/319 | Copy letter from Robert William Frederick Harrison, to Professor [George Howard] Darwin, Fellow of the Royal Society | 22 April 1901 |
| NLB/23/1/202 | Copy letter from Robert William Frederick Harrison, to Professor George Howard Darwin, Fellow of the Royal Society, Newnham Grange, Cambridge | 9 October 1901 |
| NLB/21/528 | Copy letter from Arthur William Rucker, to Professor George Howard Darwin, [Fellow of the Royal Society] | 3 December 1900 |
| NLB/23/1/400 | Copy letter from Robert William Frederick Harrison, to Professor George Howard Darwin, Fellow of the Royal Society | 6 November 1901 |
| NLB/23/2/247 | Copy letter from Joseph Larmor, to Professor George Howard Darwin, Fellow of the Royal Society | 9 September 1902 |
| NLB/23/1/38 | Copy letter from Theodore E James, to Professor George Howard Darwin, Fellow of the Royal Society | 21 August 1901 |
| NLB/22/808 | Copy letter from Robert William Frederick Harrison, to Professor [George Howard] Darwin, Fellow of the Royal Society | 19 July 1901 |
| NLB/23/1/407 | Copy letter from Robert William Frederick Harrison, to Professor George Howard Darwin, Fellow of the Royal Society | 8 November 1901 |
| NLB/23/1/224 | Copy letter from Robert William Frederick Harrison, to Professor George Howard Darwin, Fellow of the Royal Society | 12 October 1901 |
| NLB/23/1/244 | Copy letter from Robert William Frederick Harrison, to Professor George Howard Darwin, Fellow of the Royal Society | 16 October 1901 |
| NLB/25/20 | Copy letter from Robert William Frederick Harrison, to Professor George Howard Darwin, Fellow of the Royal Society | 24 July 1902 |
| NLB/23/2/315 | Copy letter sent from Joseph Larmor, to Professor George Howard Darwin, Fellow of the Royal Society | 20 March 1903 |
| NLB/23/1/423 | Copy letter from Robert William Frederick Harrison, to Professor George Howard Darwin, Fellow of the Royal Society | 11 November 1901 |
| NLB/23/2/318 | Copy letter sent from Sir Michael Foster, to The Under Secretary of State for Foreign Affairs, Foreign Office | 25 March 1903 |
| NLB/23/1/596 | Copy letter from Robert William Frederick Harrison, to Professor George Howard Darwin, Fellow of the Royal Society | 10 December 1901 |
| NLB/24/690 | Copy letter from Robert William Frederick Harrison, to Professor George Howard Darwin, Fellow of the Royal Society | 17 June 1902 |
| NLB/29/130 | Copy letter from Robert William Frederick Harrison, to Professor George Howard Darwin, Fellow of the Royal Society | 9 July 1904 |
| NLB/41/446 | Copy letter from Robert William Frederick Harrison, to Sir George Howard Darwin, Fellow of the Royal Society | 15 December 1909 |
| NLB/26/782 | Copy letter from Robert William Frederick Harrison to, Professor George Howard Darwin, Fellow of the Royal Society | 29 May 1903 |
| NLB/28/74 | Copy letter from Robert William Frederick Harrison, to Professor Augustus Edward Hough Love, Fellow of the Royal Society | 5 January 1904 |
| NLB/29/303 | Copy letter from Robert William Frederick Harrison, to Professor George Howard Darwin, Fellow of the Royal Society, Newnham Grange, Cambridge | 12 September 1904 |
| NLB/30/99 | Copy letter from Joseph Larmor, to Arthur Robert Hinks, Sir William Henry Mahoney Christie, Professor George Howard Darwin, Mr Frank Watson Dyson, and Professor Ralph Allen Sampson, [Fellows of the Royal Society] | 27 January 1905 |
| NLB/28/250 | Copy letter from Robert William Frederick Harrison, to Professor Augustus Edward Hough Love, Fellow of the Royal Society, Chairman of the Mathematics Committee | 3 February 1904 |
| NLB/31/907 | Copy memorandum from an unknown correspondent, to Sir George Howard Darwin, Fellow of the Royal Society, Newnham Grange, Cambridge | [5 December 1905] |
| NLB/30/885 | Copy letter from Robert William Frederick Harrison, to Professor George Howard Darwin, Fellow of the Royal Society | 6 June 1905 |
| NLB/28/733 | Copy letter from Robert William Frederick Harrison, to Professor George Howard Darwin, Fellow of the Royal Society | 9 May 1904 |
| NLB/32/79 | Copy letter from Robert William Frederick Harrison, to Sir George Darwin, Fellow of the Royal Society | 22 December 1905 |
| MC/21/137 | Postcard from [George Howard] Darwin, Cambridge, to Professor [Joseph] Larmor, Secretary of the Royal Society | [28 January 1906] |
| NLB/32/312 | Copy letter from Robert William Frederick Harrison, to the Secretary to His Majesty's Treasury | 16 February 1906 |
| NLB/31/877 | Copy letter from Robert William Frederick Harrison, to Sir George Howard Darwin, Fellow of the Royal Society | 28 November 1905 |
| NLB/33/131 | Copy letter from Robert William Frederick Harrison, to Sir George Howard Darwin, Fellow of the Royal Society | 3 July 1906 |
| NLB/32/345 | Copy letter from Joseph Larmor, to Sir George Darwin, [Fellow of the Royal Society] | 22 February 1906 |
| NLB/32/419 | Copy letter from Robert William Frederick Harrison, to Sir George Howard Darwin, Fellow of the Royal Society | 27 February 1906 |
| NLB/33/180 | Copy letter from Robert William Frederick Harrison, to Sir George Howard Darwin, Fellow of the Royal Society | 11 July 1906 |
| NLB/32/504 | Copy letter from Robert William Frederick Harrison, to Professor William Burnside, Fellow of the Royal Society, Chairman of the Mathematics Sectional Committee | 21 March 1906 |
| NLB/36/20 | Copy letter from Robert William Frederick Harrison, to Sir George Howard Darwin, Fellow of the Royal Society | 25 July 1907 |
| NLB/32/730 | Copy letter from Joseph Larmor, to Sir George Darwin, [Fellow of the Royal Society] | 17 May 1906 |
| NLB/36/31 | Copy letter from Robert William Frederick Harrison, to Sir George Howard Darwin, Fellow of the Royal Society | 26 July 1907 |
| NLB/32/871 | Copy letter from Robert William Frederick Harrison, to Sir George Darwin, Fellow of the Royal Society, Cambridge | 8 June 1906 |
| NLB/35/318 | Copy letter from Robert William Frederick Harrison, to Sir George Darwin, Fellow of the Royal Society | 15 May 1907 |
| NLB/36/83 | Copy letter from Robert William Frederick Harrison, to Sir George Howard Darwin, Fellow of the Royal Society, Newnham College, Cambridge | 7 August 1907 |
| NLB/36/119 | Copy letter from Robert William Frederick Harrison, to Sir George Howard Darwin, Fellow of the Royal Society | 19 August 1907 |
| NLB/45/177 | Copy letter from Robert William Frederick Harrison to Sir George H [Howard] Darwin KCB, FRS | 12 January 1912 |
| NLB/34/478 | Copy letter from Robert William Frederick Harrison, to Sir George Howard Darwin, Fellow of the Royal Society | 29 January 1907 |
| NLB/34/726 | Copy letter from Archibald Geikie, to George Howard Darwin, Fellow of the Royal Society | 2 March 1907 |
| NLB/37/86 | Copy letter from Joseph Larmor, Sectretary of the Royal Society to Dr George [Howard] Darwin FRS | 24 January 1908 |
| NLB/34/608 | Copy letter from Archibald Geikie, to Sir George Howard Darwin, Fellow of the Royal Society | 14 February 1907 |
| NLB/34/888 | Copy letter from Robert William Frederick Harrison, to Sir George Howard Darwin, Fellow of the Royal Society | 21 March 1907 |
| NLB/36/890 | Copy letter from Robert William Frederick Harrison, to Sir George Darwin, Fellow of the Royal Society | 8 January 1908 |
| NLB/37/751 | Copy letter from Robert William Frederick Harrison to Sir George H [Howard] Darwin, KCB, Fellow of the Royal Society | 8 May 1908 |
| NLB/37/282 | Copy letter from Robert William Frederick Harrison to Sir George H [Howard] Darwin KCB, FRS | 25 February 1908 |
| NLB/37/705 | Copy letter from Robert William Frederick Harrison to Sir George Darwin, KCB, Fellow of the Royal Society | 4 May 1908 |
| NLB/37/732 | Copy letter from Robert William Frederick Harrison to Sir G [George] H [Howard] Darwin, KCB, Fellow of the Royal Society | 6 May 1908 |
| NLB/37/713 | Copy letter from Robert William Frederick Harrison to Sir George Darwin, KCB, Fellow of the Royal Society | 4 May 1908 |
| NLB/38/483 | Copy letter from Robert William Frederick Harrison, to Sir George Howard Darwin, Fellow of the Royal Society | 10 August 1908 |
| NLB/38/551 | Copy letter from Theodore E James, to Sir George Howard Darwin, Fellow of the Royal Society | [September 1908] |
| NLB/43/114 | Copy letter from Robert William Frederick Harrison, to Sir George Howard Darwin, Fellow of the Royal Society | 7 November 1910 |
| NLB/42/61 | Copy letter from Robert William Frederick Harrison to Sir George H [Howard] Darwin KCB, FRS | 18 March 1910 |
| NLB/42/96 | Copy letter from Robert William Frederick Harrison to The President of the R Accademia dei Lincei, Rome | 24 March 1910 |
| NLB/42/54 | Copy letter from Robert William Frederick Harrison to The Secretary, HM Treasury | 18 March 1910 |
| NLB/42/62 | Copy letter from Robert William Frederick Harrison to Dr W [William] N [Napier] Shaw FRS | 18 March 1910 |
| NLB/42/94 | Copy letter from Robert William Frederick Harrison to Sir G [George] H [Howard] Darwin KCB, FRS | 23 March 1910 |
| NLB/45/104 | Copy letter from Robert William Frederick Harrison to Sir George Darwin KCB, FRS | 22 December 1911 |
| NLB/43/235 | Copy letter from Robert William Frederick Harrison, to Sir George Howard Darwin, Fellow of the Royal Society | 26 November 1910 |
| MC/25/54 | Letter from [George Howard] Darwin, Newham Grange, Cambridge, to Mr [Robert] Harrison, [Royal Society] | 18 September 1910 |
| NLB/45/9 | Copy letter from Joseph Larmor to [George Howard] Darwin | 6 December 1911 |
| NLB/44/744 | Copy letter from Joseph Larmor to Sir George Howard Darwin, KCB, FRS | 3 November 1911 |
| NLB/44/786 | Copy letter from Robert William Fredercik Harrison to George H [Howard] Darwin, KCB, FRS | 10 November 1911 |
| NLB/45/47 | Copy letter from Robert William Frederick Harrison to Sir G [George] H [Howard] Darwin KCB, FRS | 12 December 1911 |
| NLB/45/86 | Copy letter from Robert William Frederick Harrison to Sir George Darwin KCB, FRS | 19 December 1911 |
| NLB/45/687 | Copy letter from Robert William Frederick Harrison to Sir G [George] H [Howard] Darwin, KCB, FRS | 23 April 1912 |
| NLB/46/235 | Copy letter from Robert William Frederick Harrison, to Sir George Howard Darwin, Fellow of the Royal Society | 28 June 1912 |
| NLB/45/667 | Copy letter from Robert William Frederick Harrison to Sir G [George] H [Howard] Darwin KCB, FRS | 22 April 1912 |
| RR/9/89 | Referee's report by George Howard Darwin, on a paper 'On the vibrations of a vortex ring, and the action upon each other of two vortices in a perfect fluid' by Joseph John Thomson | 1882 |
| RR/11/183 | Report by Joseph Norman Lockyer, on his paper 'On the photographic spectra of some of the brighter stars' in response to George Howard Darwin's observations | 1893 |
| RR/8/90 | Referee's report by John William Strutt, 3rd Baron Rayleigh, on a paper 'On the bodily tides of viscous and semi-elastic spheroids, and on the ocean tides upon a yielding nucleus' by George Howard Darwin | 20 July 1878 |
| RR/8/154 | Referee's report by John William Strutt, 3rd Baron Rayleigh, on two papers 'On the precession of a viscous spheroid, and on the remote history of the Earth' and 'Problems connected with the tides of viscous spheroid' by George Howard Darwin | 13 June 1879 |
| RR/8/283 | Referee's report by William Thomson, Lord Kelvin, on a paper 'On the tidal friction of a planet attended by several satellites, and on the evolution of the solar system' by George Howard Darwin | 5 May 1881 |
| RR/11/246 | Referee's report by George Howard Darwin, on a paper 'On the annual and semi-annual seismic periods' by Charles Davison | 9 July 1893 |
| RR/10/337 | Referee's report by William Thomson, Lord Kelvin, on the Bakerian Lecture 'On tidal prediction' by George Howard Darwin | 23 December 1890 |
| RR/17/298 | Referee's report by George Howard Darwin, on a paper 'The proportion of the sexes produced by whites and 'coloured people' in Cuba' by Walter Heape | 27 November 1908 |
| RR/13/95 | Referee's report by George Howard Darwin, on a paper 'Mathematical contributions to the theory of evolution.—III. Regression, heredity, and panmixia' by Karl Pearson | 27 October 1895 |
| RR/11/64 | Referee's report by George Howard Darwin, on a paper 'On the causes which produce the phenomena of new stars' by Joseph Norman Lockyer | 17 January 1891 |
| RR/13/49 | Letter from George Howard Darwin, on a paper 'The rotation of an elastic spheroid' by Sydney Samuel Hough to the Secretary of the Royal Society | 11 December 1895 |
| RR/13/162 | Referee's report by George Howard Darwin, on a paper 'On the significance of Bravais' formulæ for regression, in the case of skew correlation' by George Udny Yule | 7 January 1897 |
| RR/12/205 | Referee's report by George Howard Darwin, on a paper 'Contributions to the mathematical theory of evolution.—II. Skew variation in homogeneous material' by Karl Pearson | 28 December 1894 |
| RR/13/19 | Referee's report by George Howard Darwin, on a paper 'On the diurnal periodicity of earthquakes' by Charles Davison | 15 May 1896 |
| RR/13/53 | Letter from George Howard Darwin, on a paper 'On lunar periodicities in earthquake frequency' by Cargill Gilston Knott to Richard Tetley Glazebrook | 11 December 1896 |
| RR/13/218 | Referee's report by George Howard Darwin, on a paper 'The total solar eclipse of August 9, 1896.- Report on the expedition to Kiö Island' by Joseph Norman Lockyer | 1 June 1897 |
| RR/17/427 | Referee's report by George Howard Darwin, on a paper 'The figure of the earth' by J Prescott | 2 February 1909 |
| RR/15/317 | Referee's report by George Hartley Bryan, on a paper 'The stability of the pear-shaped figure of equilibrium of a rotating mass of liquid' by George Howard Darwin | August 1902 |
| RR/13/224 | Letter from George Howard Darwin, on a paper 'A Maya calendar inscription, interpreted by Goodman's tables' by Alfred Percival Maudslay to the Secretary of the Royal Society | 10 April 1897 |
| RR/12/402 | Referee's report by George Howard Darwin, on a paper 'India's contribution to geodesy' by James Thomas Walker | 8 June 1895 |
| RR/14/83 | Referee's report by George Howard Darwin, on a paper 'Mathematical contributions to the theory of evolution. —VI. Genetic (reproductive) selection: Inheritance of fertility in man, and of fecundity in thoroughbred racehorses' by Karl Pearson | 4 December 1898 |
| RR/13/241 | Referee's report by George Howard Darwin, on a paper 'On the distribution of frequency (variation and correlation) of the barometric height at divers stations' by Karl Pearson and Alice Lee | 28 June 1897 |
| RR/13/194 | Referee's report by George Howard Darwin, on a paper 'On the application of harmonic analysis to the dynamical theory of the tides. — Part I. On laplace’s "oscillations of the first species” and the dynamics of ocean currents' by Sydney Samuel Hough | 7 April 1897 |
| RR/13/196 | Referee's report by George Howard Darwin, on a paper 'On the application of harmonic analysis to the dynamical theory of the tides.—Part II. On the general integration of Laplace’s dynamical equations' by Sydney Samuel Hough | 24 October 1897 |
| RR/13/243 | Memorandum by George Howard Darwin, on Richard Strachey's report on a paper 'On the distribution of frequency (variation and correlation) of the barometric height at divers stations' by Karl Pearson and Alice Lee | 2 July 1897 |
| RR/15/171 | Referee's report by Ernest William Hobson, on a paper 'Ellipsoidal harmonic analysis' by George Howard Darwin | May 1901 |
| RR/14/5 | Letter from W Steadman Aldis, to George Howard Darwin, regarding a paper [attributed] 'Tables for the solution of the equation d2y/dx2 + 1/x · dy/dx - (1 + n2/x2) y = 0' by W Steadman Aldis | 20 August 1898 |
| RR/19/127 | Referee's report by George Howard Darwin, on a paper 'The influence of selection and assortative mating on the ancestral and fraternal correlations of a mendelian population' by E C Snow | [March 1912] |
| RR/10/143 | Letter from George Howard Darwin, to Michael Foster, regarding a paper 'On the mechanical conditions of a swarm of meteorites, and on theories of cosmogony' by George Howard Darwin | 6 July 1888 |
| RR/14/222 | Referee's report by George Howard Darwin, on a paper 'Some additional notes on the orientation of greek temples; being the result of a journey to greece and sicily in April and May, 1900' by Francis Cranmer Penrose | 13 May 1899 |
| RR/14/212 | Referee's report by George Howard Darwin, on a paper 'On the propagation of earthquake motion to great distances' by Richard Dixon Oldham | 15 July 1899 |
| RR/10/142 | Referee's report by Joseph John Thomson, on a paper 'On the mechanical conditions of a swarm of meteorites, and on theories of cosmogony' by George Howard Darwin | 28 March 1888 |
| RR/10/225 | Referee's report by George Howard Darwin, on a paper 'Report on hygrometric methods; first part, including the saturation method and the chemical method, and dew-point instruments' by William Napier Shaw | 26 February 1888 |
| RR/17/26 | Referee's report by Augustus Edward Hough Love, on a paper 'On the figure and stability of a liquid satellite' by George Howard Darwin | 16 March 1906 |
| RR/9/260 | Letter from George Howard Darwin, on his paper 'Results of the harmonic analysis of tidal observations' to the Secretary of the Royal Society | 12 March 1885 |
| MS/427/416 | Copy letter from [George Gabriel] Stokes, Secretary of the Royal Society; to [Robert Henry] Scott, Esq, FRS, Secretary of the Meteorological Council | 19 February 1885 |
| CD/46/17 | Letter from [Leonard Darwin, President of the Geographical Society], to George [Howard Darwin] | 25 November 1908 |
| CD/60/2 | Letter from [George Howard] Darwin, Newnham Grange, Cambridge, to Joseph Larmor, Secretary of the Royal Society | 22 June 1905 |
| NLB/42/65 | Copy letter from Robert William Frederick Harrison to The Senatore, Professor P Blaserna, President of the R Accademis dei Lincei | Undated |
| MS/427/391 | Note of a letter from [George Gabriel] Stokes, Secretary of the Royal Society; to Sir Henry Ponsonby | 6 November 1884 |
| MS/427/392 | Copy letter from Walter White, Assistant Secretary of the Royal Society; to the Hon. [Charles]. W. Fremantle | 7 November 1884 |
| MS/427/413 | Copy letter from [Michael] Foster, Secretary of the Royal Society; to the Secretary of the Treasury | 19 February 1885 |
| MM/15/106 | Report of the Astronomical Survey of Ancient British Monuments Committee | 29 June 1906 |
| IM/Maull/001068 | Darwin, Sir George Howard | nd |
| MC/27/81 | Letter from [George Howard] Darwin, Newham Grange, Cambridge, to Mr [Robert] Harrison, [Royal Society] | 22 May 1912 |
| MM/15/105 | Extracts from Council Minutes of the Royal Society, on the creation of a Committee to consider the subject of the proposed Astronomical survey of Ancient British Monuments | 1906 |
| MM/17/93 | Letter from GH Darwin to Michael Foster, Secretary, Royal Society | 19 November 1889 |
| MM/15/51 | Further comments by GH Darwin on a paper by FC Penrose on the orientation of a number of Greek temples | 6 April 1897 |
| NLB/2/367 | Copy letter from Herbert Rix, to Professor George Howard Darwin, Fellow of the Royal Society | 18 May 1888 |
| NLB/8/944 | Copy letter from Herbert Rix, to Professor George Howard Darwin, Fellow of the Royal Society | 27 January 1894 |
| NLB/8/934 | Copy letter from Herbert Rix, to Professor George Howard Darwin, Fellow of the Royal Society | 25 January 1894 |
| NLB/10/1004 | Copy letter from Michael Foster, to the Honourable F L Wood, Secretary, Charterhouse, E.C. | 21 March 1895 |
| NLB/14/72 | Copy letter from Robert William Frederick Harrison, to Professor George Howard Darwin, Fellow of the Royal Society | 22 December 1896 |
| RR/15/101 | Referee's report by George Howard Darwin, on a paper 'Mathematical contributions to the theory of evolution. IX. On the principle of homotyposis and its relation to heredity. Part I. Homotyposis in the vegetable kingdom' by Karl Pearson | 15 December 1900 |
| RR/15/78 | Referee's report by George Henry Darwin, on a paper 'Data for the problem of evolution in man VI. A first study of the correlation of the human skull' by Alice Lee and Karl Pearson | 15 August 1900 |
| NLB/14/599 | Copy letter from Robert William Frederick Harrison, to Professor George Howard Darwin, Fellow of the Royal Society | 7 April 1897 |
| NLB/45 | New Letter Book volume 45, copy letters sent from Royal Society administration | 5 December 1911-21 May 1912 |
| RR/17/99 | Referee's report by George Howard Darwin, on a paper 'The tidal régime of the river Mersey, as affected by the recent dredgings at the bar in Liverpool Bay' by James N Shoolbred | 14 June 1906 |
| RR/17/25 | Referee's report by William Davidson Niven, on a paper 'Roche's Ellipsoids and on allied problems relating to satellites' ['On the figure and stability of a liquid satellite'] by George Howard Darwin | 21 February 1906 |
| NLB/16/77 | Copy letter from Robert William Frederick Harrison, to Professor Henrici, Fellow of the Royal Society | 26 January 1898 |
| NLB/16/198 | Copy letter from Robert William Frederick Harrison, to Professor G H Darwin, Fellow of the Royal Society, Newnham Grange, Cambridge | 19 February 1898 |
| NLB/15/272 | Copy letter from Michael Foster and Arthur William Rucker, to William Turner Thiselton-Dyer, Professor Edward Albert Sharpey-Schafer, Professor George Howard Darwin, Richard Tetley Glazebrook, Professor Edwin Ray Lankester, Sir Archibald Geikie, Fellows of the Royal Society | 24 July 1897 |
| NLB/15/624 | Copy letter from Robert William Frederick Harrison, to Professor Andrew Russell Forsyth, Fellow of the Royal Society | 5 November 1897 |
| NLB/16/120 | Copy letter from Robert William Frederick Harrison, to Professor Arthur William Rucker | 5 February 1898 |
| NLB/15/852 | Copy letter from Arthur William Rucker, to the Secretary, Her Majesty's Treasury, Whitehall, S.W. | 24 December 1897 |
| NLB/17/478 | Copy letter from Arthur William Rucker, to George Howard Darwin, [Fellow of the Royal Society] | 8 November 1898 |
| NLB/19/857 | Copy letter from Robert William Frederick Harrison, to Professor George Howard Darwin, Fellow of the Royal Society | 9 January 1900 |
| NLB/19/855 | Copy letter from Robert William Frederick Harrison, to Professor Andrew Russell Forsyth, Fellow of the Royal Society | 8 January 1900 |
| NLB/20/278 | Copy letter from Arthur William Rucker, to William Abbott Herdman, [Fellow of the Royal Society] | 12 March 1900 |
| NLB/25/635 | Copy letter from Robert William Frederick Harrison, to Professor George Howard Darwin, [Fellow of the Royal Society] | 2 December 1902 |
| NLB/28/766 | Copy letter from Robert William Frederick Harrison, to Professor George Howard Darwin, Fellow of the Royal Society | 16 May 1904 |
| NLB/34/755 | Copy letter from Archibald Geikie, to Professor Herbert Hall Turner, Fellow of the Royal Society | 5 March 1907 |
| NLB/39/91 | Copy letter from Robert William Frederick Harrison to Sir George H [Howard] Darwin, KCB, Fellow of the Royal Society | 25 November 1908 |
| NLB/39/171 | Copy letter from Robert William Frederick Harrison to Professor S [Sydney] J [John] Hickson, Fellow of the Royal Society, Chairman of the Zoology Sectional Committee | 4 December 1908 |
| NLB/45/707 | Copy letter from Robert William Frederick Harrison to Sir George H [Howard] Darwin, KCB, FRS | 27 April 1912 |
| RR/8/93 | Second letter from George Howard Darwin, regarding a paper 'On the bodily tides of viscous and semi-elastic spheroids, and on the ocean tides upon a yielding nucleus' by George Howard Darwin | 7 November 1878 |
| RR/10/135 | Referee's report by George Howard Darwin, on a paper 'On Aeolotropic elastic solids' by Charles Chree | 1 August 1888 |
| RR/10/246 | Referee's report by George Howard Darwin, on a paper 'The waves on a rotating liquid spheroid of finite ellipticity' by George Hartley Bryan | 5 November 1888 |
| RR/10/29 | Referee's report by John Couch Adams, on a paper 'On figures of equilibrium of rotating masses of fluid' by George Howard Darwin | 22 June 1887 |
| RR/14/81 | Referee's report by George Howard Darwin, on a paper 'Mathematical contributions to the theory of evolution.—V. On the reconstruction of the stature of prehistoric races' by Karl Pearson | 1 August 1898 |
| RR/12/74 | Letter from William Thomson, Lord Kelvin, to George Howard Darwin, regarding a paper 'On the straining of the Earth resulting from secular cooling' by Charles Davison | 3 February 1894 |
| NLB/16 | New Letter Book volume 16, copy letters sent from Royal Society administration | 11 January 1898-29 June 1898 |
| EC/1879/13 | Darwin, Sir George Howard: certificate of election to the Royal Society | |
| NLB/3/949 | Copy letter from Herbert Rix, to Professor Michael Foster, [Royal Society] | 22 November 1889 |
| NLB/7/33 | Copy letter from Michael Foster, to Professor Carlo F Ferraris, Rector of the University of Padua | 13 November 1892 |
| NLB/7/27 | Copy letter from Herbert Rix, to Professor George Howard Darwin, Fellow of the Royal Society | 14 November 1892 |
| RR/15/173 | Referee's report by William Mitchinson Hicks, on a paper 'The pear shaped and other figures of equilibrium of a rotating mass of liquid' by George Howard Darwin | September 1901 |
| NLB/16/74 | Copy letter from Robert William Frederick Harrison, to Professor Henrici, Fellow of the Royal Society | 26 January 1898 |
| NLB/35/339 | Copy letter from Robert William Frederick Harrison, to Professor Charles Scott Sherrington, Fellow of the Royal Society | 17 May 1907 |
| NLB/36/775 | Copy letter from Robert William Frederick Harrison, to Professor William Burnside, Fellow of the Royal Society, Chairman of the Mathematics Sectional Committee | 13 December 1907 |
| NLB/32 | New Letter Book volume 32, copy letters sent from Royal Society administration | 9 December 1905-13 June 1906 |
| RR/10/30 | Referee's report by Archibald Geikie, on a paper 'On figures of equilibrium of rotating masses of fluid' by George Howard Darwin | 31 May 1887 |
| RR/10/49 | Referee's report by George Howard Darwin, on a paper 'Some anomalies in the winds of Northern India, and their relation to the distribution of barometric pressure' by S A Hill | 19 May 1887 |
| RR/12/39 | Referee's report by George Howard Darwin, on a paper 'Harmonic analysis of hourly observations of air temperature and pressure at British observatories.—part I. Temperature' by Richard Strachey | 22 March 1893 |
| RR/12/146 | Referee's report by George Howard Darwin, on a paper 'An estimate of the degrees of legitimate natality as derived from a table of natality compiled by the author from his observations made at Budapest' by Joseph Kórösi | 31 January 1894 |
| RR/12/79 | Second letter from George Howard Darwin, to John William Strutt, Lord Rayleigh, regarding a paper 'On the straining of the Earth resulting from secular cooling' by Charles Davison | 29 October 1894 |
| RR/12/75 | Second letter from William Thomson, Lord Kelvin, to George Howard Darwin, regarding a paper 'On the straining of the Earth resulting from secular cooling' by Charles Davison | 6 February 1894 |
| RR/14/3 | Letter from Joseph John Thomson, to George Howard Darwin, regarding a paper [attributed] 'Tables for the solution of the equation d2y/dx2 + 1/x · dy/dx - (1 + n2/x2) y = 0' by W Steadman Aldis | 3 August 1898 |
| RR/15/174 | Referee's report by Augustus Edward Hugh Love, on a paper 'The pear shaped and other figures of equilibrium of a rotating mass of liquid' by George Howard Darwin | 8 October 1901 |
| RR/16/216 | Referee's report by George Howard Darwin, on a paper 'The seismic effect of tidal stresses' by Richard Dixon Oldham | 7 May 1904 |
| MC/11/294 | Letter from G H [George Howard] Darwin, Down, Beckenham, Kent, Railway Station, Orpington, to Sir William Thomson | 30 December 1878 |
| MC/11/373 | Letter from G H [George Howard] Darwin, Trinity College, to Professor [George Gabriel] Stokes, [Secretary of the Royal Society] | 5 June 1879 |
| MC/11/393 | Letter from G H [George Howard] Darwin, 6 Queen Anne Street, to W [Walter] White, [Assistant Secretary of the Royal Society] | 23 June 1879 |
| MC/11/399 | Letter from G H [George Howard] Darwin, Trinity College Cambridge, to W [Walter] White, [Assistant Secretary of the Royal Society] | 13 July 1879 |
| MC/11/404 | Letter from G H [George Howard] Darwin, Trinity College Cambridge, to W [Walter] White, [Assistant Secretary of the Royal Society] | 21 July 1879 |
| MC/11/403 | Letter from G H [George Howard] Darwin, Trinity College Cambridge, to W [Walter] White, [Assistant Secretary of the Royal Society] | 17 July 1879 |
| MC/11/391 | Letter from G H [George Howard] Darwin, Down, Beckenham, Kent, to W [Walter] White, [Assistant Secretary of the Royal Society] | 21 June 1879 |
| MC/11 | Volume 11 of miscellaneous correspondence regarding business matters, sent to the Royal Society | 1877-1879 |
| MC/12/31 | Letter from G H [George Howard] Darwin, Down, Beckenham, to the Royal Society | 2 April 1880 |
| MC/12/164 | Letter from G G [George Gabriel] Stokes, [Secretary of the Royal Society], Lensfield Cottage, Cambridge, to [Walter] White, [Assistant Secretary of the Royal Society] | 26 May 1881 |
| MC/12 | Volume 12 of miscellaneous correspondence regarding business matters, sent to the Royal Society | 1880-1883 |
| RR/9/7 | Referee's report by John Couch Adams, on a paper 'On the stresses caused in the interior of the earth by the weight of continents and mountains' by George Howard Darwin | 18 January 1882 |
| RR/8/14 | Referee's report by William Thomson, 1st Baron Kelvin, on a paper 'On the influence of geological changes on the earth's axis of rotation' by George Howard Darwin | 7 March 1877 |
| RR/12/76 | Third letter from William Thomson, Lord Kelvin, to George Howard Darwin, regarding a paper 'On the straining of the Earth resulting from secular cooling' by Charles Davison | 7 February 1894 |
| RR/12/77 | Referee's report by George Howard Darwin, on a paper 'On the straining of the Earth resulting from secular cooling' by Charles Davison | 14 July 1894 |
| RR/12/99 | Referee's report by George Howard Darwin, on a paper 'The asymmetrical probability curve' by F Y Edgeworth | 3 July 1894 |
| RR/15/316 | Referee's report by Augustus Edward Hough Love, on a paper 'The stability of the pear-shaped figure of equilibrium of a rotating mass of liquid' by George Howard Darwin | 28 July 1902 |
| RR/8/284 | Referee's report by William Thomson, Lord Kelvin, on two papers 'On the stresses caused in the interior of the earth by the weight of continents and mountains' by George Howard Darwin, and 'On the limit of the liquid state' by J B Hannay | 30 October 1881 |
| RR/15/177 | Second referee's report by Augustus Edward Hough Love, on a paper 'The pear shaped and other figures of equilibrium of a rotating mass of liquid' by George Howard Darwin | 30 October 1901 |
| PP/4/3 | Paper, 'On the formation of ripple-mark in sand' by G H [George Howard] Darwin | 1883 |
| PP/4/3/1 | Manuscript, 'On the formation of ripple-mark in sand' by G H [George Howard] Darwin | 1883 |
| PP/4/3/2 | Figures, ripple marks in sand by G H [George Howard] Darwin | 1883 |
| PP/4/11 | Paper, 'On the figure of equilibrium of a planet of heterogeneous density' by G H [George Howard] Darwin | 1883 |
| PP/9/10 | Paper, 'On Jacobi's figure of equilibrium for a rotating mass of fluid' by G H [George Howard] Darwin | 1886 |
| PP/8/19 | Paper, 'On the correction to the equilibrium theory of tides for the continents' by G H [George Howard] Darwin and H H [Herbert Hall] Turner | 1886 |
| PP/6/30 | Paper, 'Note on a previous paper' by G H [George Howard] Darwin | 1885 |
| PP/6/30/1 | Manuscript, 'Note on a previous paper' by G H [George Howard] Darwin | 1885 |
| PP/6/30/2 | Diagrams, 'Diagram showing curves of equal stress-difference due to the weight of second harmonic inequalities or to tide-generating force' by G H [George Howard] Darwin | 1885 |
| PP/9/10/1 | Manuscript, 'On Jacobi's figure of equilibrium for a rotating mass of fluid' by G H [George Howard] Darwin | 1886 |
| PP/9/11 | Paper, 'On the dynamical theory of the tides of long period' by G H [George Howard] Darwin | 1886 |
| NLB/6/786 | Copy letter from Herbert Rix, to Professor J P van der Stok, Director of the Observatory Batavia, Java [Jakarta, Indonesia] | 13 July 1892 |
| PP/9/10/2 | Diagrams, geometrical diagrams by G H [George Howard] Darwin | 1886 |
| PP/17/17/1 | Manuscript, 'The rupture of steel by longitudinal stress' by Charles A [Ashley] Carus-Wilson | 1890 |
| PP/15/26 | Paper, 'On the stability of a rotating spheroid of perfect liquid' by G H [George Hartley] Bryan | 1890 |
| PP/13/36 | Paper, 'Second series of results of the harmonic analysis of tidal observations' by G H [George Howard] Darwin | 1889 |
| PP/20/23/1 | Paper, 'On an apparatus for facilitating the reduction of tidal observations' by G H [George Howard] Darwin | 1892 |
| PP/20/23/2 | Diagrams, harmonic analysis by G H [George Howard] Darwin | 1892 |
| PP/16/27 | Paper, 'On the harmonic analysis of tidal observations of high and low water' by G H [George Howard] Darwin | 1890 |
| PP/17/17 | Paper, 'The rupture of steel by longitudinal stress' by Charles A [Ashley] Carus-Wilson | 1890 |
| PP/20/23 | Paper, 'On an apparatus for facilitating the reduction of tidal observations' by G H [George Howard] Darwin | 1892 |
| RR/8/91 | Referee's report by William Thomson, 1st Baron Kelvin, on a paper 'On the bodily tides of viscous and semi-elastic spheroids, and on the ocean tides upon a yielding nucleus' by George Howard Darwin | nd [1878] |
| RR/8/153 | Referee's report by William Thomson, Lord Kelvin, on two papers 'On the precession of a viscous spheroid, and on the remote history of the Earth' and 'Problems connected with the tides of viscous spheroid' by George Howard Darwin | 13 May 1879 |
| RR/14/124 | Letter from George Howard Darwin, to Arthur William Rucker, regarding a paper 'On the orientation of the pyramids and temples in the Sûdân' by E A Wallis Budge | 29 July 1899 |
| RR/15/94 | Referee's report by George Howard Darwin, on a paper 'Mathematical contributions to the theory of evolution VIII. On the correlation of characters not quantitatively measurable' by Karl Pearson | 18 February 1900 |
| RR/15/137 | Referee's report by George Howard Darwin, on a paper 'The association of attributes in statistics, with examples from the material of the Childhood Society, etc' on a paper by George Udny Yule | 8 November 1899 |
| RR/8/13 | Referee's report by Alexander Ross Clarke, on a paper 'On the influence of geological changes on the earth's axis of rotation' by George Howard Darwin | 4 April 1877 |
| RR/8/92 | Letter from George Howard Darwin, on his paper 'On the bodily tides of viscous and semi-elastic spheroids, and on the ocean tides upon a yielding nucleus' to The Royal Society | 5 August 1878 |
| RR/8/219 | Letter from George Howard Darwin, to William Thomson, Lord Kelvin, regarding a paper 'On the secular changes in the elements of the orbit of a satellite revolving about a tidally distorted planet' by Thomas Edward Thorpe | 27 June 1880 |
| RR/10/2 | Referee's report by George Howard Darwin, on a paper 'On the relation between tropical and extra-tropical cyclones' by Ralph Abercromby | 22 February 1887 |
| RR/10/31 | Referee's report by George Howard Darwin, on a paper 'On the distribution of strain in the Earth's crust resulting from secular cooling, with special reference to the growth of continents and the formation of mountain-chains' by Charles Davison | 11 June 1887 |
| RR/10/50 | Letter from George Howard Darwin, to John William Strutt, 3rd Baron Rayleigh, regarding a paper 'Some anomalies in the winds of Northern India, and their relation to the distribution of barometric pressure' by S A Hill | 4 August 1887 |
| RR/11/182 | Referee's report by George Howard Darwin, on a paper 'On the photographic spectra of some of the brighter stars' by Joseph Norman Lockyer | 13 January 1893 |
| RR/12/11 | Referee's report by George Howard Darwin, on a paper 'Contributions to the mathematical theory of evolution' by Karl Pearson | 9 November 1893 |
| RR/12/78 | Letter from George Howard Darwin, to John William Strutt, 3rd Baron Rayleigh, regarding a paper 'On the straining of the Earth resulting from secular cooling' by Charles Davison | 18 July 1894 |
| RR/12/147 | Letter from George Howard Darwin, to John William Strutt, Lord Rayleigh, regarding a paper 'An estimate of the degrees of legitimate natality as derived from a table of natality compiled by the author from his observations made at Budapest' by Joseph Kórösi | 24 February 1894 |
| RR/12/148 | Second referee's report by George Howard Darwin, on a paper 'An estimate of the degrees of legitimate natality as derived from a table of natality compiled by the author from his observations made at Budapest' by Joseph Kórösi | 3 October 1894 |
| RR/13/70 | Letter from Olaus Magnus Friedrich Erdmann Henrici, on a paper 'Octonions' by Alex McAulay to George Howard Darwin | 4 March 1896 |
| RR/13/71 | Letter from Edwin Bailey Elliott, on a paper 'Octonions' by Alex McAulay to George Howard Darwin | 8 March 1896 |
| RR/13/72 | Referee's report by George Howard Darwin, on behalf of the Mathematical Commitee, on a paper 'Octonions' by Alex McAulay | 9 March 1896 |
| RR/13/160 | Letter from George Howard Darwin, on a paper 'On the significance of Bravais' formulæ for regression, in the case of skew correlation' by George Udny Yule to Karl Pearson | 21 December 1896 |
| RR/13/161 | Letter from Karl Pearson, on a paper 'On the significance of Bravais' formulæ for regression, in the case of skew correlation' by George Udny Yule to George Howard Darwin | 27 December 1896 |
| RR/13/195 | Referee's report by George Howard Darwin, on a paper 'On the application of harmonic analysis to the dynamical theory of the tides. — Part I. On laplace’s "oscillations of the first species” and the dynamics of ocean currents' by Sydney Samuel Hough | 24 February 1897 |
| RR/13/227 | Letter from George Howard Darwin, on behalf of the Committee, on a paper 'A Maya calendar inscription, interpreted by Goodman's tables' by Alfred Percival Maudslay to the Secretary of the Royal Society | June 1897 |
| RR/13/250 | Referee's report by George Howard Darwin, on a paper 'Mathematical contributions to the theory of evolution.— IV. On the probable errors of frequency constants and on the influence of random selection on variation and correlation' by Karl Pearson and Louis Napoleon George Filon | 2 January 1898 |
| RR/14/120 | Referee's report by George Howard Darwin, on a paper 'On the orientation of the pyramids and temples in the Sûdân' by E A Wallis Budge | 25 April 1899 |
| RR/14/216 | Referee's report by George Howard Darwin, on a paper 'Mathematical contributions to the theory of evolution. —VII. On the correlation of characters not quantitatively measurable' by Karl Pearson | 25 September 1899 |
| RR/16/354 | Referee's report by George Howard Darwin, on a paper 'A biometrical study of conjugation in paramaecium' by Raymond Pearl | 31 January 1906 |
| RR/19/126 | Letter from George Howard Darwin, to John Rose Bradford, regarding a paper 'The influence of selection and assortative mating on the ancestral and fraternal correlations of a mendelian population' by E C Snow | 10 March 1912 |
| MC/15/331 | Letter from [George Howard] Darwin, Newnham Grange, Cambridge, to Professor Michael Foster, Secretary of the Royal Society | 17 December 1892 |
| MC/16/86 | Letter from [George Howard] Darwin, Newnham Grange, Cambridge, to the Secretaries of the Royal Society | 26 January 1894 |
| MC/15 | Volume 15 of miscellaneous correspondence regarding business matters, sent to the Royal Society | 1889-1892 |
| MC/18/36 | Letter from William de Wiveleslie Abney, Board of Education, South Kensington, London, to the Secretary of the Royal Society, Burlington House | 21 March 1903 |
| NLB/38/542 | Copy letter from Joseph Larmor and Sir Archibald Geikie, to Henry Frederick Baker, Fellow of the Royal Society, and others | 16 September 1908 |
| MC/25/55 | Letter from [George Howard] Darwin, Newham Grange, Cambridge, to Mr [Robert] Harrison, [Royal Society] | 20 October 1910 |
| NLB/42/727 | Copy letter from Robert William Frederick Harrison to Sir G [George] H [Howard] Darwin KCB, FRS | 27 September 1910 |
| MC/17 | Volume 17 of miscellaneous correspondence regarding business matters, sent to the Royal Society | 1897-1899 |
| MC/21 | Volume 21 of miscellaneous correspondence regarding business matters, sent to the Royal Society | 1906 |
| MC/27/80 | Letter from [George Howard] Darwin, Newham Grange, Cambridge, to the Chairman of Committee | 28 March 1912 |
| NLB/45/589 | Copy letter from Robert William Frederick Harrison to Sir G [George] H [Howard] Darwin, KCB, FRS | 1 April 1912 |
| MC/28/58 | Letter from [William Erasmus] Darwin, 11 Egerton Place, S.W, to [Robert] Harrison, [Royal Society] | 30 July 1913 |
| MC/27/288 | Letter from Edward Roberts, Park Lodge, Eltham, to Mr [Robert] Harrison, [Royal Society] | 15 February 1912 |
| NLB/32/220 | Copy letter from Robert William Frederick Harrison, to Sir George Howard Darwin, Fellow of the Royal Society | 30 January 1906 |
| MC/21/138 | Letter from [George Howard] Darwin, Newnham Grange, Cambridge, to [Alfred Bray] Kempe | 18 May 1906 |
| MC/21/139 | Postcard from [George Howard] Darwin, Cambridge, to Professor [Joseph] Larmor | 1906 |
| MC/18/37 | Letter from F G Ogilvie, Board of Education, South Kensington, London, to the Assistant Secretary of the Royal Society, Burlington House | 1 May 1903 |
| MC/18 | Volume 18 of miscellaneous correspondence regarding business matters, sent to the Royal Society | 1903 |
| MC/22/53 | Letter from [George Howard] Darwin, Newnham Grange, Cambridge, to [Archibald] Geikie | 24 July 1907 |
| MC/22/54 | Letter from [George Howard] Darwin, Newnham Grange, Cambridge, to [Robert William Frederick] Harrison | 25 July 1907 |
| MC/22/52 | Letter from [George Howard] Darwin, Newnham Grange, Cambridge, to [Archibald] Geikie | 11 July 1907 |
| MC/22 | Volume 22 of miscellaneous correspondence regarding business matters, sent to the Royal Society | 1907 |