| Reference number | Title | Date |
| EC/1909/11 | Hadfield, Sir Robert Abbott: certificate of election to the Royal Society | |
| IM/001826 | Hadfield, Sir Robert Abbott | nd |
| IM/001825 | Hadfield, Sir Robert Abbott | 1999 |
| NLB/3/194 | Copy letter from Herbert Rix, to Robert Abbott Hadfield, [Fellow of the Royal Society] | 10 April 1889 |
| NLB/30/129 | Copy letter from Robert William Frederick Harrison, to Robert Abbott Hadfield, [Fellow of the Royal Society] | 2 February 1905 |
| NLB/28/139 | Copy letter from Robert William Frederick Harrison, to Sir Benjamin Baker, Fellow of the Royal Society | 16 January 1904 |
| NLB/32/46 | Copy letter from Robert William Frederick Harrison, to Robert Abbott Hadfield, Hecla Works, Sheffield | 18 December 1905 |
| NLB/37/664 | Copy letter from Robert William Frederick Harrison to R [Robert] A [Abbott] Hadfield. 28 Hertford Street, Mayfair, W | 29 April 1908 |
| NLB/44/672 | Copy letter from Robert William Frederick Harrison to Sir Robert Hadfield FRS | 14 October 1911 |
| NLB/40/818 | Copy letter from Robert William Frederick Harrison to Sir R [Robert] A [Abbott] Hadfield FRS | 30 August 1909 |
| NLB/40/835 | Copy letter from Robert William Frederick Harrison to Messrs Harrison & Sons | 8 September 1909 |
| NLB/45/652 | Copy letter from Robert William Frederick Harrison to Sir Robert Hadfield FRS | 20 April 1912 |
| NLB/46/129 | Copy letter from Robert William Frederick Harrison, to Sir Robert Abbott Hadfield, Fellow of the Royal Society | 13 June 1912 |
| NLB/42/633 | Copy letter from Robert William Frederick Harrison to Professor B [Bertram] Hopkinson FRS | 21 July 1910 |
| NLB/44/391 | Copy letter from Robert William Frederick Harrison [signed by Theodore E James] to Messrs Harrison & Sons | 3 July 1911 |
| NLB/44/780 | Copy letter from Robert William Frederick Harrison to Sir Robert Hadfield FRS | 9 November 1911 |
| NLB/45/331 | Copy letter from Robert William Frederick Harrison to Sir Robert [Abbott] Hadfield | 14 February 1912 |
| NLB/46/291 | Copy letter from Robert William Frederick Harrison, to Sir Robert Hadfield, Fellow of the Royal Society | 6 July 1912 |
| NLB/45/366 | Copy letter from Robert William Frederick Harrison to Sir Robert Hadfield FRS | 21 February 1912 |
| NLB/47/150 | Copy letter from Robert William Frederick Harrison to Sir R [Robert Abbott] Hadfield FRS | 6 December 1912 |
| NLB/63/20 | Copy letter from James Hopwood Jeans, Secretary of the Royal Society and FRS; to Sir Dugald Clerk, FRS | 15 June 1922 |
| RR/23/38 | Referee's report by Frederick George Donnan, on a paper 'The corrosion and electrical properties of steels' by Robert Abbott Hadfield and Edgar Newbery | November 1916 |
| NLB/63/111 | Copy letter from James Hopwood Jeans, Secretary of the Royal Society and FRS; to Sir Robert [Abbott] Hadfield, FRS | 29 June 1922 |
| NLB/54/705 | Copy letter from Robert William Frederick Harrison, Assistant Secretary of the Royal Society; to Sir [Robert Abbott] Hadfield, FRS | 14 August 1917 |
| NLB/54/642 | Copy letter from Dr. Arthur Schuster, Secretary of the Royal Society; to Sir [Robert Abbott] Hadfield, FRS | 12 July 1917 |
| NLB/54/706 | Copy letter from Robert William Frederick Harrison, Assistant Secretary of the Royal Society; to Sir [Robert Abbott] Hadfield, FRS | 14 August 1917 |
| RR/35/101 | Referee's report by Cecil Henry Desch, on a paper 'Thermal changes in iron-manganese alloys, low in carbon' by Robert Abbott Hadfield | March 1927 |
| NLB/56/878 | Copy letter from Robert William Frederick Harrison, Assistant Secretary of the Royal Society; to Sir Robert [Abbott] Hadfield, FRS | 20 June 1919 |
| NLB/63/40 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to Sir Robert [Abbott] Hadfield, FRS | 16 June 1922 |
| NLB/56/760 | Copy letter from Robert William Frederick Harrison, Assistant Secretary of the Royal Society; to Sir Robert [Abbott] Hadfield, FRS | 20 May 1919 |
| NLB/60/369 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to Sir Robert [Abbott] Hadfield, FRS | 24 January 1921 |
| NLB/54/447 | Copy letter from Dr. Arthur Schuster, Secretary of the Royal Society; to Sir [Robert Abbott] Hadfield, FRS | 17 May 1917 |
| NLB/55/663 | Copy letter from Robert William Frederick Harrison, Assistant Secretary of the Royal Society; to Sir Dugald Clerk, FRS | 15 July 1918 |
| RR/18/42 | Referee's report by George Frederick Charles Searle, on a paper 'On the magnetic properties of iron and its alloys in intense field' by Robert Abbott Hadfield and Bertram Hopkinson | 14 June 1910 |
| NLB/57/471 | Copy letter from Robert William Frederick Harrison, Assistant Secretary of the Royal Society; to Sir Robert [Abbott] Hadfield, FRS | 12 November 1919 |
| RR/18/139 | Referee's report by Francis Henry Neville, on a paper 'On sinhalese iron and steel of ancient origin' by Robert Hadfield | 20 October 1911 |
| NLB/61/291 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to Sir Robert [Abbott] Hadfield, FRS | 17 June 1921 |
| RR/35/100 | Referee's report by Walter Rosenhain, on a paper 'Alloys of iron and maganese of low carbon content' by Robert Abbott Hadfield | March 1927 |
| NLB/55/641 | Copy letter from Robert William Frederick Harrison, Assistant Secretary of the Royal Society; to Sir Robert [Abbott] Hadfield, FRS | 08 July 1918 |
| NLB/64/313 | Copy letter from James Hopwood Jeans, Secretary of the Royal Society; to Sir John Dewrance; Cranmore Place, Chiselhurst | 12 March 1923 |
| NLB/63/164 | Copy letter from unknown correspondent; to Sir Robert Hadfield, FRS | 07 July 1922 |
| NLB/63/742 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to Sir Robert Hadfield, FRS | 08 December 1922 |
| IM/001827 | Hadfield, Sir Robert Abbott | 1922 |
| NLB/67/74 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to Professor [William Ernest] Dalby, FRS | 15 October 1924 |
| NLB/69/587 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to Prof. [Frederick Orpen] Bower, FRS | 12 June 1926 |
| NLB/71/803 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to the Secretary, Iron and Steel Institute, 28 Victoria Street, SW1 | 5 November 1928 |
| NLB/73/296 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to Sir Robert [Abbott] Hadfield, Bt., FRS | 8 May 1931 |
| NLB/3/224 | Copy letter from Herbert Rix, to Robert Abbott Hadfield | 12 April 1889 |
| NLB/3/276 | Copy letter from Herbert Rix, to Robert Abbott Hadfield, [Fellow of the Royal Society] | 26 April 1889 |
| NLB/28/115 | Copy letter from Robert William Frederick Harrison, to Sir Benjamin Baker, Fellow of the Royal Society | 12 January 1904 |
| RR/25/42 | Referee's report by Robert Abbott Hadfield, on the Bakerian Lecture 'Experiments on the artificial production of diamond' by Charles Algernon Parsons | nd [1918] |
| EC/1909/10 | Hadfield, Sir Robert Abbott: certificate of election to the Royal Society | |
| NLB/53/370 | Copy letter from Robert William Frederick Harrison, Assistant Secretary of the Royal Society; to The Secretary, Reconstruction Committee, 6a Dean's Yard, S.W. | 24 July 1916 |
| RR/48/1 | Referee's report by Cecil Henry Desch, on a paper 'On the effect of the temperature of liquid hydrogen (-252.8° C.) On the tensile properties of forty-one specimens of metals comprising (a) pure iron 99.85%; (b) four carbon steels; (c) thirty alloy steels; (d) copper and nickel; (e) four non-ferrous alloy' by W J De Haas and Robert Abbott Hadfield | [June 1933] |
| VF/15 | Portrait of Sir Robert Abbott Hadfield by Wallace Hester | 14 November 1901 |
| RR/35/99 | Referee's report by Henry Cort Harold Carpenter, on a paper 'Alloys of iron and maganese of low carbon content' by Robert Abbott Hadfield | 14 March 1927 |
| RR/24/45 | Referee's report by Samuel Walter Johnson Smith, on a paper 'A contribution to the study of the magnetic properties of manganese and of some special manganese steels' by Robert Abbott Hadfield, C Chéneveau and Ch Géneau | nd [1917] |
| RR/26/106 | Referee's report by James Alfred Ewing, on a paper 'On the influence of low temperatures on the magnetic properties of alloys of iron with nickel and manganese' by Heike Kamerlingh Onnes, Robert Abbott Hadfield and H R Woltjer | 22 March 1921 |
| RR/43/47 | Referee's report by Cecil Henry Desch, on a paper 'A research on Faraday's "steel and alloys"' by Robert Abbott Hadfield | July 1931 |
| RR/43/48 | Referee's report by James Alfred Ewing, on a paper 'A research on Faraday's "steel and alloys"' by Robert Abbott Hadfield | 1931 |
| RR/48/2 | Referee's report by Walter Rosenhain, on a paper 'On the effect of the temperature of liquid hydrogen (-252.8° C.) On the tensile properties of forty-one specimens of metals comprising (a) pure iron 99.85%; (b) four carbon steels; (c) thirty alloy steels; (d) copper and nickel; (e) four non-ferrous alloy' by W J De Haas and Robert Abbott Hadfield | [May 1933] |
| MC/19/35 | Letter from [Benjamin] Baker, 2 Queen Square Place, Queen Anne's Mansions, Westminster, to the Assistant Secretary of the Royal Society | 13 March 1904 |
| MC/19/34 | Letter from [Benjamin] Baker, 2 Queen Square Place, Queen Anne's Mansions, Westminster, to the Assistant Secretary of the Royal Society | 8 January 1904 |
| MC/25/94 | Letter from [Robert Abbott] Hadfield, Care Kidder & Co, Bankers, 56 Wall Street, New York, to The Secretaries, Royal Society, London | 15 May 1910 |
| MC/27/188 | Letter from [George Christopher] Lloyd, Secretary, The Iron and Steel Institute, 28 Victoria Street, London, S.W, to [Robert] Harrison, Assistant Secretary, The Royal Society, Burlington House, W | 19 February 1912 |
| MC/27/189 | Letter from [George Christopher] Lloyd, Secretary, The Iron and Steel Institute, 28 Victoria Street, London, S.W, to [Robert] Harrison, Assistant Secretary, The Royal Society, Burlington House, W | 15 November 1912 |
| MC/27/190 | Letter from [George Christopher] Lloyd, Secretary, The Iron and Steel Institute, 28 Victoria Street, London, S.W, to [Robert] Harrison, Assistant Secretary, The Royal Society, Burlington House, W | 10 December 1912 |
| MC/19 | Volume 19 of miscellaneous correspondence regarding business matters, sent to the Royal Society | 1904 |
| MC/31/62 | Letter from [Robert Abbott] Hadfield, 22 Carlton House Terrace, S.W, to [Robert] Harrison, The Royal Society, Burlington House, W | 17 November 1916 |
| MC/31/63 | Letter from [Robert Abbott] Hadfield, 22 Carlton House Terrace, S.W, to Professor [Arthur] Schuster, Royal Society, Burlington House, W | 18 November 1916 |
| MC/32/120 | Letter from [Robert Abbott] Hadfield, 22 Cartlon House Terrace, S.W, to Professor Arthur Schuster, The Royal Society, Burlington House, W | 1 May 1917 |
| MC/32/121 | Letter from [Robert Abbott] Hadfield, 22 Cartlon House Terrace, S.W, to [Robert] Harrison, The Royal Society, Burlington House, W | 14 June 1917 |
| MC/33/80 | Letter from [Robert Abbott] Hadfield, 22 Carlton House Terrace, London, S.W.1., to Mr [Robert] Harrison, Secretary, The Royal Society, Burlington House, W. | 30 September 1918 |
| MC/37/31 | Letter from John Dewrance, 165 Great Dover Street, London, S.E.1., to [Francis Alexander] Towle, The Royal Society, Burlington House, W.1. | 10 January 1923 |
| MC/33/81 | Letter from [Robert Abbott] Hadfield, 22 Carlton House Terrace, S.W.1, to [Robert] Harrison, Royal Society, Burlington House, W. | 11 October 1918 |