| RefNo | Title | Date |
| GLB/24/10 | Extract from the address to the Physiological Section of the British Association Meeting of 1899 by J N Langley | mid 20th century |
| MM/16/64 | Letter from JN Langley, Cambridge, to the Secretary of the Society | 24 May 1904 |
| NLB/52/8 | Copy letter from Robert William Frederick Harrison Assistant Secretary of the Royal Society to Professor John Newport Langley FRS | 14 July 1915 |
| NLB/46/460 | Copy letter from Joseph Larmor, to Dr John Newport Langley, Fellow of the Royal Society | 1 August 1912 |
| NLB/26/387 | Copy letter from Robert William Frederick Harrison to, Dr John Newport Langley, Fellow of the Royal Society | 10 March 1903 |
| NLB/12/691 | Copy letter from Herbert Rix, to John Newport Langley, Fellow of the Royal Society, Trinity College, Cambridge | 13 April 1896 |
| NLB/2/89 | Copy letter from Herbert Rix, to John Newport Langley, Fellow of the Royal Society | 9 January 1888 |
| NLB/2/263 | Copy letter from Michael Foster, to John Newport Langley, Fellow of the Royal Society | 15 March 1888 |
| NLB/2/407 | Copy letter from Herbert Rix, to John Newport Langley, Fellow of the Royal Society | 4 June 1888 |
| NLB/2/535 | Copy letter from Herbert Rix, to John Newport Langley, Trinity College, Cambridge | 28 July 1888 |
| NLB/2/413 | Copy letter from Herbert Rix, to John Newport Langley, Fellow of the Royal Society | 7 June 1888 |
| NLB/2/590 | Copy letter from Herbert Rix, to Professor John Newport Langley, Fellow of the Royal Society | 19 September 1888 |
| NLB/7/385 | Copy letter from Herbert Rix, to the Cambridge Engraving Company | 3 February 1893 |
| NLB/2/843 | Copy letter from Herbert Rix, to John Newport Langley, Fellow of the Royal Society | 21 November 1888 |
| NLB/2/225 | Copy letter from Herbert Rix, to John Newport Langley, Trinity College Cambridge | 5 March 1888 |
| NLB/4/1013 | Copy letter from Herbert Rix, to John Newport Langley, Fellow of the Royal Society | 22 December 1890 |
| NLB/6/181 | Copy letter from Herbert Rix, to John Newport Langley, Fellow of the Royal Society, Trinity College, Cambridge | 19 March 1892 |
| NLB/6/185 | Copy letter from Herbert Rix, to John Newport Langley, Fellow of the Royal Society | 21 March 1892 |
| NLB/6/180 | Copy letter from Herbert Rix, to John Newport Langley, Fellow of the Royal Society | 18 March 1892 |
| NLB/6/752 | Copy letter from Herbert Rix, to John Newport Langley, Fellow of the Royal Society | 8 July 1892 |
| NLB/6/734 | Copy letter from Herbert Rix, to John Newport Langley, Fellow of the Royal Society | 4 July 1892 |
| NLB/6/1158 | Copy letter from Michael Foster, to General Sir Henry Frederick Ponsonby | November 1892 |
| NLB/5/525 | Copy letter from Michael Foster, to John Newport Langley, Fellow of the Royal Society | 7 July 1891 |
| NLB/7/87 | Copy letter from Herbert Rix, to John Newport Langley, Fellow of the Royal Society | 28 November 1892 |
| NLB/7/685 | Copy letter from Herbert Rix, to Mr Edwin Wilson, Cambridge | 10 April 1893 |
| NLB/7/381 | Copy letter from Herbert Rix, to John Newport Langley, Trinity College, Cambridge | 1 February 1893 |
| NLB/5/768 | Copy letter from Herbert Rix, to John Newport Langley, Fellow of the Royal Society | 7 October 1891 |
| NLB/7/639 | Copy letter from Herbert Rix, to Mr Edwin Wilson, Post Office Terrace, Cambridge | 28 March 1893 |
| NLB/7/448 | Copy letter from Herbert Rix, to John Newport Langley, Fellow of the Royal Society | 21 February 1893 |
| NLB/9/81 | Copy letter from Herbert Rix, to John Newport Langley, Fellow of the Royal Society | 22 March 1894 |
| NLB/10/638 | Copy letter from Herbert Rix, to John Newport Langley, Fellow of the Royal Society | 11 January 1895 |
| NLB/11/656 | Copy letter from Theodore E James, to Dr Charles Scott Sherrington, Fellow of the Royal Society | 27 August 1895 |
| NLB/12/495 | Copy letter from Herbert Rix, to John Newport Langley, Fellow of the Royal Society | 28 February 1896 |
| NLB/13/160 | Copy letter from Robert William Frederick Harrison, to Dr John Newport Langley, Fellow of the Royal Society | 23 June 1896 |
| NLB/12/418 | Copy letter from Herbert Rix, to John Newport Langley, Fellow of the Royal Society | 17 February 1896 |
| NLB/12/438 | Copy letter from Herbert Rix, to John Newport Langley, Fellow of the Royal Society, Trinity College, Cambridge | 19 February 1896 |
| NLB/12/462 | Copy letter from Michael Foster, to John Newport Langley, [Fellow of the Royal Society] | 20 February 1896 |
| NLB/13/665 | Copy letter from Robert William Frederick Harrison, to John Newport Langley, Fellow of the Royal Society, Trinity College, Cambridge | 29 October 1896 |
| NLB/13/718 | Copy letter from Robert William Frederick Harrison, to Dr John Newport Langley, Fellow of the Royal Society | 10 November 1896 |
| RR/15/218 | Referee's report by John Newport Langley, on a paper 'The properties of the arterial and venous walls' by J A MacWilliam | November 1901 |
| NLB/16/95 | Copy letter from Robert William Frederick Harrison, to Dr J N Langley, Fellow of the Royal Society | 29 January 1898 |
| NLB/18/684 | Copy letter from Robert William Frederick Harrison, to Dr J N Langley, Fellow of the Royal Society, Trinity College, Cambridge | 21 April 1899 |
| NLB/16/847 | Copy letter from Robert William Frederick Harrison, to Dr J N Langley | 21 June 1898 |
| NLB/17/52 | Copy letter from Michael Foster, to Joseph Chamberlain, Her Majesty's Secretary of State for the Colonies | 7 July 1898 |
| NLB/16/607 | Copy letter from Robert William Frederick Harrison, to J N Langley, Fellow of the Royal Society | 6 May 1898 |
| NLB/17/514 | Copy letter from Robert William Frederick Harrison, to Dr John Newport Langley, Fellow of the Royal Society | 11 November 1898 |
| NLB/19/367 | Copy letter from Theodore E James, to John Newport Langley, Fellow of the Royal Society | 29 August 1899 |
| NLB/22/605 | Copy letter from Robert William Frederick Harrison, to Dr [John Newport] Langley, Fellow of the Royal Society | 10 June 1901 |
| NLB/18/349 | Copy letter from Robert William Frederick Harrison, to Dr J N Langley, Fellow of the Royal Society, Trinity College, Cambridge | 27 February 1899 |
| NLB/18/607 | Copy letter from Robert William Frederick Harrison, to Dr J N Langley, Fellow of the Royal Society | 10 April 1899 |
| NLB/18/655 | Copy letter from Robert William Frederick Harrison, to Dr J N Langley, Fellow of the Royal Society, Trinity College, Cambridge | 17 April 1899 |
| NLB/19/596 | Copy letter from Robert William Frederick Harrison, to Dr John Newport Langley, Fellow of the Royal Society | 7 November 1899 |
| NLB/19/657 | Copy letter from Robert William Frederick Harrison, to Dr John Newport Langley, Fellow of the Royal Society, Trinity College, Cambridge | 18 November 1899 |
| NLB/22/487 | Copy letter from Robert William Frederick Harrison, to Dr [John Newport] Langley | 22 May 1901 |
| NLB/22/511 | Copy letter from Robert William Frederick Harrison, to Dr [John Newport] Langley, Fellow of the Royal Society, Trinity College, Cambridge | 24 May 1901 |
| NLB/22/580 | Copy letter from Robert William Frederick Harrison, to [John Newport] Langley, Fellow of the Royal Society | 8 June 1901 |
| NLB/21/759 | Copy letter from Robert William Frederick Harrison, to Dr John Newport Langley, Fellow of the Royal Society | 25 January 1901 |
| NLB/25/129 | Copy letter from Theodore E James, to Dr John Newport Langley, Fellow of the Royal Society | 18 August 1902 |
| NLB/25/117 | Copy letter from Theodore E James, to John Newport Langley, Fellow of the Royal Society | 13 August 1902 |
| NLB/23/2/522 | Copy letter from Robert William Frederick Harrison, to Professor John Newport Langley, Fellow of the Royal Society | 8 July 1904 |
| NLB/36/590 | Copy letter from Robert William Frederick Harrison, to Professor John Newport Langley, Fellow of the Royal Society, Hedgerley Lodge, Cambridge | 18 November 1907 |
| NLB/30/43 | Copy letter from Robert William Frederick Harrison, to Professor John Newport Langley, Fellow of the Royal Society | 20 January 1905 |
| NLB/32/627 | Copy letter from [Theodore E James], to Professor [John Newport] Langley, [Fellow of the Royal Society] | 25 April 1906 |
| NLB/29/111 | Copy letter from Robert William Frederick Harrison, to Professor John Newport Langley, Fellow of the Royal Society | 6 July 1904 |
| NLB/30/6 | Copy letter from Robert William Frederick Harrison, to Professor John Newport Langley, Fellow of the Royal Society | 16 January 1905 |
| NLB/30/267 | Copy letter from Robert William Frederick Harrison, to Professor John Newport Langley, Fellow of the Royal Society | 21 February 1905 |
| NLB/29/95 | Copy letter from Robert William Frederick Harrison, to Professor John Newport Langley, Fellow of the Royal Society, Hedgerley Lodge, Madingley Road, Cambridge | 1 July 1904 |
| NLB/31/122 | Copy letter from Robert William Frederick Harrison, to Professor John Newport Langley, Fellow of the Royal Society | 26 June 1905 |
| NLB/32/227 | Copy letter from Robert William Frederick Harrison, to Professor Joseph Newport Langley, Fellow of the Royal Society | 1 February 1906 |
| NLB/32/205 | Copy letter from Robert William Frederick Harrison, to Professor John Newport Langley, Fellow of the Royal Society | 26 January 1906 |
| NLB/32/185 | Copy letter from Robert William Frederick Harrison, to Professor John Newport Langley, Fellow of the Royal Society | 22 January 1906 |
| NLB/32/481 | Copy letter from Robert William Frederick Harrison, to Professor John Newport Langley, Fellow of the Royal Society | 19 March 1906 |
| MC/20/93 | Memo from [John Newport] Langley, Journal of Physiology, Hedgerley Lodge, Madingley Road, Cambridge, to the Assistant Secretary of the Royal Society | 17 January 1905 |
| MC/21/358 | Letter from [John Newport] Langley, Hedgerley Lodge, Cambridge, to [Robert William Frederick] Harrison | 4 April 1906 |
| NLB/33/326 | Copy letter from Robert William Frederick Harrison, to Professor John Newport Langley, Fellow of the Royal Society | 3 August 1906 |
| MC/30/107 | Letter from [John Newport] Langley, Journal of Physiology, Hedgerley Lodge, Madingley Road, Cambridge, to [William Bate] Hardy, [Royal Society] | 16 March 1915 |
| NLB/33/368 | Copy letter from A H White, to Professor John Newport Langley, Fellow of the Royal Society | 16 August 1906 |
| NLB/32/728 | Copy letter from Robert William Frederick Harrison, to Professor John Newport Langley, [Fellow of the Royal Society] | 18 May 1906 |
| NLB/32/886 | Copy letter from Robert William Frederick Harrison, to Professor John Newport Langley, Fellow of the Royal Society | 12 June 1906 |
| NLB/32/750 | Copy letter from Robert William Frederick Harrison, to Professor John Newport Langley, Hedgerley Lodge, Cambridge | 21 May 1906 |
| NLB/32/831 | Copy letter from Robert William Frederick Harrison, to Professor John Newport Langley, Fellow of the Royal Society | 30 May 1906 |
| NLB/37/748 | Copy letter from Robert William Frederick Harrison to Professor J [John] N [Newport] Langley, Fellow of the Royal Society, Hedgeley Lodge, Madingley road, Cambridge | 7 May 1908 |
| NLB/35/552 | Copy letter from Robert William Frederick Harrison, to Professor John Newport Langley, Fellow of the Royal Society | 12 June 1907 |
| NLB/36/768 | Copy letter from Robert William Frederick Harrison, to Messrs Robarts Lubbock & Company | 12 December 1907 |
| NLB/37/431 | Copy postcard from the Royal Society to Professor J [John] N [Newport] Langley, Fellow of the Royal Society, Hedgerley lodge, Madingley Road, Cambridge. | 19 March 1908 |
| NLB/37/619 | Copy postcard from the Royal Society to Professor J [John] N [Newport] Langley, Fellow of the Royal Society, Hedgerley Lodge, Madingley Road, Cambridge | 14 April 1908 |
| MC/19/527 | Letter from [John Newport] Langley, Hedgerley Lodge, Madingley Road, Cambridge, to the Secretaries of the Royal Society | 29 October 1904 |
| NLB/40/628 | Copy letter from Robert William Frederick Harrison to Professor J [John] N [Newport] Langley FRS | 10 July 1909 |
| MC/24/23 | Letter from [John Newport] Langley, Hedgerley Lodge, Cambridge, to the Secretary of The Royal Society | 7 November 1909 |
| NLB/41/644 | Copy letter from Joseph Larmor, to Professor John Newport Langley, Fellow of the Royal Society | 26 January 1910 |
| NLB/44/762 | Copy letter from Robert William Frederick Harrison to Professor J [John] N [Newport Langley FRS | 6 November 1911 |
| NLB/45/586 | Copy letter from Robert William Frederick Harrison to Professor J [John] N [Newport] Langley FRS | 1 April 1912 |
| NLB/46/505 | Copy letter from [Secretary of the Royal Society], to Professor John Newport Langley, Fellow of the Royal Society | 13 August 1912 |
| NLB/48/594 | Copy letter from Robert William Frederick Harrison, to Professor [John Newport] Langley, Fellow of the Royal Society | 1 August 1913 |
| NLB/50/778 | Copy letter from Robert William Frederick Harrison, to Professor [John Newport] Langley, Fellow of the Royal Society | 5 November 1914 |
| MC/29/153 | Letter from [John Newport] Langley, Hedgerley Lodge, Cambridge, to Mr [Robert] Harrison, [Royal Society] | 22 November 1914 |
| NLB/51/553 | Copy letter from Robert William Frederick Harrison, Assistant Secretary of the Royal Society to Professor John Newport Langley FRS | 23 April 1915 |
| NLB/51/559 | Copy letter from Robert William Frederick Harrison, Assistant Secretary of the Royal Society to Professor John Newport Langley FRS | 26 April 1915 |
| NLB/51/636 | Copy letter from Robert William Frederick Harrison, Assistant Secretary of the Royal Society to Professor John Newport Langley FRS | 11 May 1915 |
| MC/21/361 | Letter from [John Newport] Langley, Hedgerley Lodge, Cambridge, to [Robert William Frederick] Harrison, Assistant Secretary of the Royal Society | 19 August 1906 |
| NLB/52/171 | Copy letter from [Robert William Frederick Harrison, Assistant Secretary of the Royal Society]; to Sir William Crookes, President of the Royal Society | 5 October 1915 |
| NLB/52/88 | Copy letter from Robert William Frederick Harrison, Assistant Secretary of the Royal Society to Professor John Newport Langley FRS | 10 August 1915 |
| NLB/54/718 | Copy letter from Robert William Frederick Harrison, Assistant Secretary of the Royal Society; to Professor [John Newport] Langley, FRS | 21 August 1917 |
| RR/9/312 | Referee's report by John Newport Langley, on a paper 'On the structure of hyaline cartilage' by George Thin | 23 February 1885 |
| NLB/54/456 | Copy letter from William Bate Hardy, Secretary of the Royal Society; to Professor [John Newport] Langley, FRS | 17 May 1917 |
| RR/22/64 | Referee's report by John Newport Langley, on a paper 'Experiments on the restoration of paralysed muscles by means of nerve anastomosis. Part III - Anastomosis of the brachial plexus, with a consideration of the distribution of its roots' by Robert Kennedy | February 1915 |
| NLB/54/455 | Copy letter from William Bate Hardy, Secretary of the Royal Society; to Professor W. H. Thompson; Ministry of Food, Grosvenor House, W. | 17 May 1917 |
| NLB/54/698 | Copy letter from Robert William Frederick Harrison, Assistant Secretary of the Royal Society; to Professor [John Newport] Langley, FRS | 13 August 1917 |
| NLB/54/620 | Copy letter from Robert William Frederick Harrison, Assistant Secretary of the Royal Society; to Professor [John Newport] Langley, FRS | 6 July 1917 |
| NLB/54/667 | Copy letter from Robert William Frederick Harrison, Assistant Secretary of the Royal Society; to Professor [John Newport] Langley, FRS | 24 July 1917 |
| NLB/54/613 | Copy letter from Robert William Frederick Harrison, Assistant Secretary of the Royal Society; to Professor [John Newport] Langley, FRS | 4 July 1917 |
| NLB/54/651 | Copy letter from Robert William Frederick Harrison, Assistant Secretary of the Royal Society; to Dr. [Henry] Head, Vice President of the Royal Society | 13 July 1917 |
| NLB/59/539 | Copy letter from Edwin Deller, Assistant Secretary of the Royal Society; to Professor [John Newport] Langley, FRS | 15 October 1920 |
| NLB/59/799 | Copy letter from William Bate Hardy, Secretary of the Royal Society; to Professor [John Newport] Langley, FRS | 13 November 1920 |
| RR/8/327 | Referee's report by Edward Emanuel Klein, on a paper 'On the histology and physiology of pepsin-forming glands' by John Newport Langley | 12 May 1881 |
| RR/8/328 | Referee's report by William Rutherford, on a paper 'On the histology and physiology of pepsin-forming glands' by John Newport Langley | 27 May 1881 |
| RR/9/358 | Referee's report by John Newport Langley, on a paper 'The minute anatomy of the brachial plexus' by W P Herringham | 8 April 1886 |
| RR/9/210 | Referee's report by John Newport Langley, on a paper 'On the cortical connexions of the optic nerves' by David James Hamilton | 27 May 1884 |
| RR/9/116 | Referee's report by John Newport Langley, on a paper 'Contributions to our knowledge of the connexion between chemical constitution, physiological action, and antagonism' by Thomas Lauder Brunton and John Theodore Cash | 1883 |
| NLB/56/848 | Copy letter from Robert William Frederick Harrison, Assistant Secretary of the Royal Society; to Professor [John Newport] Langley, FRS | 16 June 1919 |
| MC/13/85 | Letter from J N [John Newport] Langley, Trinity College, Cambridge, to the Secretary of the Royal Society | 11 August 1884 |
| RR/10/128 | Referee's report by John Newport Langley, on a paper 'An investigation into the functions of the occipital and temporal lobes of the monkey's brain' by Sanger Brown and Edward Albert Sharpey-Schafer | 6 February 1888 |
| RR/11/72 | Referee's report by John Newport Langley, on a paper 'Results of hemisection of the spinal cord in monkeys' by Frederick Walker Mott | 11 July 1891 |
| RR/10/324 | Referee's report by John Newport Langley, on a paper 'An experimental investigation into the arrangement of the excitable fibres of the internal capsule of the bonnet monkey (Macacus sinicus)' by Charles E Beevor and Victor Alexander Haden Horsley | 13 January 1890 |
| RR/11/167 | Referee's report by John Newport Langley, on a paper 'The hippocampus' by Alex Hill | 1 June 1892 |
| NLB/60/354 | Copy letter from William Bate Hardy, Secretary of the Royal Society; to Professor [John Newport] Langley, FRS | 21 January 1921 |
| NLB/60/160 | Copy letter from William Bate Hardy, Secretary of the Royal Society; to Professor [John Newport] Langley, FRS | 16 December 1920 |
| RR/11/20 | Letter from John Newport Langley, on a paper 'On some of the variations observed in the rabbit’s liver under certain physiological and pathological circumstances' by Thomas Lauder Brunton and Sheridan Delépine to Foster | 16 November 1891 |
| RR/12/220 | Referee's report by John Newport Langley, on a paper 'Degenerations consequent on experimental lesions of the cerebellum' by J S Risien Russell | nd [1894] |
| RR/11/178 | Referee's report by David Ferrier, on a paper 'On the origin from the spinal cord of the cervical and thoracic sympathetic fibres, with some observations on white and grey rami communicantes' by John Newport Langley | 19 February 1892 |
| RR/13/32 | Letter from John Newport Langley, on a paper 'On the granular leucocytes' by G. Lovell Gulland to the Secretary of the Royal Society | 16 January 1896 |
| RR/14/207 | Detailed referee's report by John Newport Langley, on a paper 'The physiological action of choline and neurine' by Frederick Walker Mott and William Dobinson Halliburton | nd [1899] |
| RR/14/206 | Referee's report by John Newport Langley, on a paper 'The physiological action of choline and neurine' by Frederick Walker Mott and William Dobinson Halliburton | 3 May 1899 |
| RR/13/297 | Referee's report by John Newport Langley, on a paper 'The relations between marine animal and vegetable life' by H M Vernon | 30 January 1898 |
| RR/13/128 | Referee's report by John Newport Langley, on a paper 'Experiments in examination of the peripheral distribution the fibres of the posterior roots of some spinal nerves. -Part II' by Charles Scott Sherrington | 7 December 1896 |
| RR/17/278 | Referee's report by John Newport Langley, on a paper 'The embedding of the embryo guinea-pig in the uterine wall and its nutrition at all stages of development' by E Emrys-Roberts | November 1908 |
| NLB/60/163 | Copy letter from William Bate Hardy, Secretary of the Royal Society; to Professor [John Newport] Langley, FRS | 16 December 1920 |
| RR/18/156 | Referee's report by John Newport Langley, on a paper 'Experiments on the restoration of paralysed muscles by means of nerve anastomosis. Part I - substitutes for the facial nerve' by Robery Kennedy | 18 April 1911 |
| RR/18/93 | Referee's report by John Newport Langley, on a paper 'The chromaphil tissues and the adrenal medulla' by Thomas Swale Vincent | 10 April 1910 |
| RR/10/325 | Referee's report by John Newport Langley, on a paper 'A record of the results obtained, by electrical excitation of the so-called motor cortex and internal capsule in an orang-outang (Simia satyrus)' by Charles E Beevor and Victor Alexander Haden Horsley | 6 July 1890 |
| NLB/63/637 | Copy letter from James Hopwood Jeans, Secretary of the Royal Society and FRS; to Professor [John Newport] Langley, FRS | 21 November 1922 |
| NLB/57/552 | Copy letter from Sir William Bate Hardy, Secretary of the Royal Society; to Professor JN [John Newport] Langley, FRS | 3 December 1919 |
| NLB/62/828 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to Professor [John Newport] Langley, FRS | 16 May 1922 |
| NLB/62/804 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to Professor [John Newport] Langley, FRS | 10 May 1922 |
| NLB/63/263 | Copy letter from James Hopwood Jeans, Secretary of the Royal Society and FRS; to Professor [John Newport] Langley, FRS | 28 July 1922 |
| NLB/62 | New Letter Book volume 62, copy letters sent from Royal Society administration | 11 November 1921-10 June 1922 |
| RR/9/328 | Referee's report by John Newport Langley, on a paper 'A minute analysis (experimental) of the various movements produced by stimulating in the monkey different regions of the cortical centre for the upper limb, as defined by Professor Ferrier' by Charles E Beevor and Victor Horsley | 12 August 1886 |
| NLB/63/204 | Copy letter from James Hopwood Jeans, Secretary of the Royal Society and FRS; to Professor [John Newport] Langley, FRS | 17 July 1922 |
| RR/10/144 | Referee's report by John Newport Langley, on a paper 'On the development of the electric organ of Raia batis' by James Cossar Ewart | 24 April 1888 |
| NLB/65/9 | Copy letter from James Hopwood Jeans, Secretary of the Royal Society; to Professor [John Newport] Langley, FRS | 12 July 1923 |
| NLB/65/73 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to Professor [John Newport] Langley, FRS | 24 July 1923 |
| NLB/65/125 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to [William Bate] Hardy Esq., Secretary of the Royal Society | 4 August 1923 |
| NLB/64/826 | Copy letter from James Hopwood Jeans, Secretary of the Royal Society; to [Charles Thomas] Heycock Esq. FRS | 26 June 1923 |
| NLB/65/44 | Copy letter from James Hopwood Jeans, Secretary of the Royal Society; to [Charles Thomas] Heycock Esq., FRS | 17 July 1923 |
| NLB/65/41 | Copy letter from James Hopwood Jeans, Secretary of the Royal Society; to Professor [John Newport] Langley, FRS | [17 July 1923] |
| NLB/65/132 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to [Charles Thomas] Heycock Esq., FRS | 8 August 1923 |
| NLB/68/929 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to Sir Hugh Anderson, FRS | 1 December 1925 |
| NLB/69/907 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to the Cambridge University Press | 12 November 1926 |
| NLB/7/7 | Copy letter from Michael Foster, to John Newport Langley, Fellow of the Royal Society | [10 November 1892] |
| RR/10/281 | Referee's report by Walter Holbrook Gaskell, on a paper 'On the secretion of saliva, chiefly on the secretion of salts in it' by John Newport Langley and H M Fletcher | nd [1888] |
| NLB/2/500 | Copy letter from Herbert Rix, to John Newport Langley, Fellow of the Royal Society | 20 July 1888 |
| NLB/2/648 | Copy letter from Herbert Rix, to Professor George Gabriel Stokes, President of the Royal Society | 2 October 1888 |
| NLB/12/500 | Copy letter from Herbert Rix, to John Newport Langley, Fellow of the Royal Society | 2 March 1896 |
| NLB/13/590 | Copy letter from Robert William Frederick Harrison, to Lord Rayleigh [John William Strutt], Secretary, Royal Society | 13 October 1896 |
| RR/16/312 | Referee's report by John Newport Langley, on a paper by 'An investigation into the structure of the lumbo-sacral-coccygeal cord of the macaque monkey (macacus sinicus)' by Mabel Purefoy Fitzgerald | 10 November 1905 |
| NLB/17/38 | Copy letter from Robert William Frederick Harrison, to Dr John Newport Langley, Fellow of the Royal Society, Trinity College, Cambridge | 7 July 1898 |
| NLB/32/171 | Copy letter from Archibald Geikie, to Professor John Newport Langley, [Fellow of the Royal Society] | 19 January 1906 |
| NLB/39/44 | Copy letter from Robert William Frederick Harrison to Unknown Recipient | 17 November 1908 |
| NLB/51/428 | Copy letter from Robert William Frederick Harrison, Assistant Secretary of the Royal Society to Professor John Newport Langley FRS | 18 March 1915 |
| RR/10/280 | Referee's report by John Scott Burdon-Sanderson, on a paper 'On the secretion of saliva, chiefly on the secretion of salts in it' by John Newport Langley and H M Fletcher | 27 August 1888 |
| RR/10/381 | Referee's report by John Newport Langley, on a paper 'On out-lying nerve-cells in the mammalian spinal-cord' by Charles Scott Sherrington | 3 March 1890 |
| RR/17/172 | Referee's report by John Newport Langley, on a paper 'On the occurrence of post-tetanic tremor in several types of muscle' by David Fraser Harris | 16 April 1907 |
| RR/10/10 | Referee's report by John Newport Langley, on a paper 'A further minute analysis by electric stimulation of the so-called motor region of the cortex cerebri in the monkey (Macacus sinicus)' by Charles E Beevor and Victor Alexander Haden Horsley | 12 October 1887 |
| EC/1883/12 | Langley, John Newport: certificate of election to the Royal Society | |
| RR/10/263 | Referee's report by John Newport Langley, on a paper 'On the descending degenerations which follow lesions of the gyrus marginalis and gyrus fornicatus in monkeys' by E P France and Edward Albert Sharpey-Schafer | 9 April 1889 |
| RR/11/226 | Referee's report by John Newport Langley, on a paper 'A further minute analysis by electric stimulation of the so-called motor region (Facial area) of the cortex cerebri in the monkey (macacus sinicus)' by Charles E Beevor and Victor Alexander Haden Horsley | 29 April 1893 |
| NLB/52 | New Letter Book volume 52, copy letters sent from Royal Society administration | 9 July 1915-8 March 1916 |
| PP/7/8 | Paper, 'On variations in the amount and distribution, of fat in the liver-cells of the frog' by J N [John Newport] Langley | 1885 |
| RR/10/113 | Referee's report by John Newport Langley, on the Croonian Lecture 'On the coagulation of the blood' by Leonard Charles Wooldridge | 29 January 1887 |
| RR/10/52 | Referee's report by John Newport Langley, on a paper 'A record of experiments upon the functions of the cerebral cortex' by Victor Alexander Haden Horsley and Edward Albert Sharpey-Schafer | 4 April 1887 |
| RR/12/37 | Referee's report by John Newport Langley, on a paper 'Experiments in examination of the peripheral distribution of the fibres of the posterior roots of some spinal nerves' by Charles Scott Sherrington | 30 January 1893 |
| RR/13/29 | Letter from John Newport Langley, on a paper 'On the granular leucocytes' by G. Lovell Gulland to the Secretary of the Royal Society | 26 August 1895 |
| RR/13/129 | Referee's report by John Newport Langley, on a paper 'Experiments in examination of the peripheral distribution the fibres of the posterior roots of some spinal nerves. -Part II' by Charles Scott Sherrington [COPY] | 7 December 1896 |
| RR/14/11 | Referee's report by John Newport Langley, on a paper 'Observations on the anatomy, physiology and degenerations of the nervous system of the bird' by Rubert William Boyce and W B Warrington | 20 December 1898 |
| RR/15/74 | Referee's report by John Newport Langley, on a paper 'The restoration of co-ordinated movements after nerve crossing with interchange of function of the cerebral cortical centres' by Robert Kennedy | 19 December 1900 |
| MC/13 | Volume 13 of miscellaneous correspondence regarding business matters, sent to the Royal Society | 1884 |
| RR/11/171 | Referee's report by John Newport Langley, on a paper 'The cerebrum of ornithrohynchus paradoxus' by Alex Hill | 1 September 1892 |
| RR/11/41 | Referee's report by John Newport Langley, on a paper 'Contribution to the study of the vertebrate liver' by Sheridan Delépine | 20 January 1891 |
| RR/11/21 | Referee's report by John Newport Langley, on a paper 'On some of the variations observed in the rabbit’s liver under certain physiological and pathological circumstances' by Thomas Lauder Brunton and Sheridan Delépine | 16 November 1891 |
| RR/16/66 | Referee's report by John Newport Langley, on a paper 'A comparative study of the grey and white matter of the motor-cell groups; and the spinal-accessory nerve in the spinal cord of the porpoise, (Phocoena communis)' by D Hepburn and D Waterston | 13 August 1903 |
| PP/6/24 | Paper, 'The "paralytic" secretion of saliva' by J N [John Newport] Langley | 1885 |
| PP/8/25 | Paper, 'On the structure of mucous salivary glands' by J N [John Newport] Langley | 1886 |
| PP/14/34 | Paper, 'On the local paralysis of peripheral ganglia, and on the connexion of different classes of nerve fibres with them' by John Newport Langley and W [William] Lee Dickinson | 1889 |
| PP/15/27 | Paper, 'On the progressive paralysis of the different classes of nerve cells in the superior cervical ganglion' by J N [John Newport] Langley and W [William] Lee Dickinson | 1890 |
| PP/20/31 | Paper, 'Preliminary account of the arrangement of the sympathetic nervous system, based chiefly on observations upon pilo-motor nerves' by John Newport Langley | 1893 |
| MC/15/314 | Letter from [John Newport] Langley, Trinity College, Cambridge, to Professor [Michael] Foster, Secretary of the Royal Society | 12 November 1892 |
| RR/10/146 | Referee's report by John Newport Langley, on two papers 'The electric organ of the skate. - On the structure of the electric organ of Raia circularis' and 'The electric organ of the skate.—The electric organ of Raia radiata' by James Cossar Ewart | 6 June 1888 |
| RR/9/119 | Letter from John Newport Langley, on a paper 'Contributions to our knowledge of the connexion between chemical constitution, physiological action, and antagonism' by Thomas Lauder Brunton and John Theodore Cash to the Secretary of the Royal Society | 6 October 1883 |
| RR/9/214 | Referee's report by John Newport Langley, on a paper 'On the structure and functional significance of the human Corpus callosum' by David James Hamilton | 27 August 1884 |
| RR/10/148 | Referee's report by John Newport Langley, on a paper 'The electric organ of the skate.—The electric organ of Raia radiata' by James Cossar Ewart | 9 July 1888 |
| RR/10/279 | Referee's report by John Newport Langley, on a paper 'The relation of physiological action to atomic weight' by Miss H J Johnstone and Thomas Carnelley | 9 November 1889 |
| RR/11/147 | Referee's report by John Newport Langley, on a paper 'The electric organ of the skate.–Observations on the structure, relations, progressive development, and growth, of the electric organ of the skate' by James Cossar Ewart | 30 March 1892 |
| RR/12/30 | Referee's report by John Newport Langley, on a paper 'An experimental investigation of the nerve roots which enter into the formation of the lumbo-sacral plexus of Macacus rhesus' by J S Risien Russell | nd [1893] |
| RR/13/176 | Referee's report by John Newport Langley, on a paper 'An experimental research upon cerebro-cortical afferent and efferent tracts' by David Ferrier and W Aldren Turner | 6 June 1897 |
| RR/15/224 | Referee's report by John Newport Langley, on a paper 'The chemistry of nerve-degeneration' by Frederick Walker Mott and William Dobinson Halliburton | April 1901 |
| RR/20/82 | Referee's report by John Newport Langley, on a paper 'Experiments on the restoration of paralysed muscles by means of nerve anastomosis. Part II - Anastomosis of the nerves supplying limb muscles' by Robert Kennedy | January 1914 |
| MC/14/304 | Letter from [John Newport] Langley, Trinity College, Cambridge, to the Secretary of the Royal Society | 3 March 1888 |
| MC/14/324 | Letter from [John Newport] Langley, Trinity College, Cambridge, to the Royal Society | 16 May 1888 |
| MC/16/304 | Letter from [John Newport] Langley, Journal of Physiology, Trinity College, Cambridge, to the Secretary of the Royal Society | 7 April 1896 |
| MC/14 | Volume 14 of miscellaneous correspondence regarding business matters, sent to the Royal Society | 1885-1888 |
| MC/15 | Volume 15 of miscellaneous correspondence regarding business matters, sent to the Royal Society | 1889-1892 |
| MC/16 | Volume 16 of miscellaneous correspondence regarding business matters, sent to the Royal Society | 1893-1896 |
| NLB/41/288 | Copy letter from Robert William Frederick Harrison, to Professor John Newport Langley, Fellow of the Royal Society | 16 November 1909 |
| NLB/41/252 | Copy letter from Robert William Frederick Harrison, to Professor John Newport Langley, Fellow of the Royal Society | 9 November 1909 |
| MC/17 | Volume 17 of miscellaneous correspondence regarding business matters, sent to the Royal Society | 1897-1899 |
| MC/20/92 | Letter from [John Newport] Langley, Trinity College, Cambridge, to [Joseph] Larmor | 17 January 1905 |
| MC/24 | Volume 24 of miscellaneous correspondence regarding business matters, sent to the Royal Society | 1909 |
| MC/19 | Volume 19 of miscellaneous correspondence regarding business matters, sent to the Royal Society | 1904 |
| MC/20 | Volume 20 of miscellaneous correspondence regarding business matters, sent to the Royal Society | 1905 |
| MC/21/357 | Letter from [John Newport] Langley, Hedgerley Lodge, Cambridge, to Sir Archibald [Geikie] | 20 January 1906 |
| MC/30/106 | Letter from [John Newport] Langley, Journal of Physiology, Hedgerley Lodge, Madingley Road, Cambridge, to [William Bate] Hardy, [Royal Society] | 13 March 1915 |
| NLB/32/569 | Copy letter from Robert William Frederick Harrison, to Professor John Newport Langley, Fellow of the Royal Society | 6 April 1906 |
| MC/21/359 | Letter from [John Newport] Langley, Hedgerley Lodge, Cambridge, to [Robert William Frederick] Harrison | 10 June 1906 |
| MC/30/108 | Letter from [John Newport] Langley, Journal of Physiology, Hedgerley Lodge, Madingley Road, Cambridge, to [William Bate] Hardy, The Biological Secretary, Royal Society | 25 April 1915 |
| MC/30/109 | Letter from [John Newport] Langley, Journal of Physiology, Hedgerley Lodge, Madingley Road, Cambridge, to Mr [Robert] Harrison, The Assistant Secretary, Royal Society | 27 April 1915 |
| MC/21/360 | Letter from [John Newport] Langley, Hedgerley Lodge, Cambridge, to the Assistant Secretary of the Royal Society | 16 August 1906 |
| MC/31/91 | Letter from [John Newport] Langley, Physiological Laboratory, Cambdirge, to [William Bate] Hardy, [Royal Society] | 14 November 1916 |
| MC/32/165 | Letter from [John Newport] Langley, Hedgerley Lodge, Hedgerley Road, Cambridge, to Mr [Robert] Harrison, [Royal Society] | 24 October 1917 |