| RefNo | Title | Date |
| IM/Maull/002653 | Lawes, Sir John Bennet | nd |
| IM/Maull/002654 | Lawes, Sir John Bennet | nd |
| MM/19/77 | Letter from Joseph Henry Gilbert to William Sharpey | 25 November 1872 |
| IM/002656 | Lawes, Sir John Bennet | nd |
| NLB/2/418 | Copy letter from Herbert Rix, to Dr Arthur Gamgee, Fellow of the Royal Society | 13 June 1888 |
| NLB/4/629 | Copy letter from Herbert Rix, to Sir John Bennet Lawes, Fellow of the Royal Society | 25 July 1890 |
| NLB/3/427 | Copy letter from Herbert Rix, to Charles Whitehead, Barming House, Maidstone | 7 June 1889 |
| NLB/3/426 | Copy letter from Herbert Rix, to R Hamilton Few, 19 Surrey Street, Strand | 7 June 1889 |
| NLB/3/428 | Copy letter from Herbert Rix, to Sir John Lawes, Fellow of the Royal Society | 7 June 1889 |
| NLB/3/443 | Copy letter from Herbert Rix, to Sir John Lawes, Fellow of the Royal Society | 12 June 1889 |
| NLB/3/836 | Copy letter from Herbert Rix, to Sir John Lawes, Fellow of the Royal Society | 21 October 1889 |
| NLB/10/756 | Copy letter from Herbert Rix, to Sir John Bennet Lawes | 31 January 1895 |
| NLB/10/848 | Copy letter from Herbert Rix, to Sir John Lawes, Fellow of the Royal Society | 19 February 1895 |
| NLB/12/401 | Copy letter from Herbert Rix, to Sir John Lawes, Fellow of the Royal Society | 12 February 1896 |
| NLB/19/336 | Copy letter from Theodore E James, to Horace Tabberer Brown, Fellow of the Royal Society | 10 August 1899 |
| NLB/19/345 | Copy letter from Theodore E James, to Sir William Turner Thiselton-Dyer, Fellow of the Royal Society | 16 August 1899 |
| NLB/19/347 | Copy letter from Theodore E James, to Professor Joseph Reynolds Green, Fellow of the Royal Society | 18 August 1899 |
| NLB/19/391 | Copy letter from Theodore E James, to Sir Michael Foster, Secretary, Royal Society | 13 September 1899 |
| NLB/19/666 | Copy letter from Michael Foster, to Sir John Bennett Lawes and Sir Joseph Henry Gilbert, [Fellows of the Royal Society] | 20 November 1899 |
| NLB/20/328 | Copy letter from Arthur William Rucker, to Sir John Bennet Lawes, and Sir Joseph Henry Gilbert, Fellows of the Royal Society | 23 March 1900 |
| VF/21 | Portrait of Sir John Bennet Lawes by Théobald Chartran | 08 July 1882 |
| EC/1854/08 | Lawes, Sir John Bennet: certificate of election to the Royal Society | |
| MS/743/1/113 | Letter from John Bennet Lawes, Rothamsted, St Albans, to [John Hall] Gladstone | 7 February 1888 |
| IM/Maull/002655 | Lawes, Sir John Bennet | nd |
| IM/002652 | Lawes, Sir John Bennet | 1999 |
| NLB/8/164 | Copy letter from Lord Kelvin [William Thomson], to Sir John Bennet Lawes, Fellow of the Royal Society | [24 July 1893] |
| NLB/11/254 | Copy letter from Herbert Rix, to Sir John Evans, Treasurer, Royal Society | 20 May 1895 |
| RR/10/186 | Referee's report by Hugo Muller, on a paper 'On the present position of the question of the sources of the nitrogen of vegetation, with some new results, and preliminary notice of new lines of investigation' by John Bennet Lawes and Joseph Henry Gilbert | 28 June 1888 |
| RR/9/59 | Referee's report by Joseph Dalton Hooker and William Turner Thiselton-Dyer, on a paper 'Agricultural, botanical, and chemical results of experiments on the mixed herbage of permanent meadow, conducted for more than twenty years in succession on the same land. — Part. II. The botanical results' by John Bennet Lawes, J H Gilbert and Maxwell Tylden Masters | 16 March 1882 |
| NLB/10/151 | Copy letter from Herbert Rix, to Sir John Evans, Fellow of the Royal Society | 9 October 1894 |
| RR/14/189 | Referee's report by Joseph Reynolds Green, on a paper 'Agricultural, botanical, and chemical results of experiments on the mixed herbage of permanent grass-land, conducted for many years in succession on the same land.—Part III. The chemical results' by John Bennet Lawes and Joseph Henry Gilbert | nd [August 1899] |
| PT/62/3/3 | Plate, 'Apparatus used in 1857, in experiments on the question whether plants assimilate free nitrogen' by unknown artist | [1860] |
| RR/3/173 | Referee's report by William Benjamin Carpenter, on a paper 'Experimental inquiry into the composition of some of the animals fed and slaughtered as human food' by John Bennet Lawes and Joseph Henry Gilbert | 28 October 1858 |
| PT/62/3/4 | Plate, 'Apparatus used in 1858, in experiments on the question whether plants assimilate free nitrogen' by unknown artist | [1860] |
| PT/62/3/7 | Plate, figures 14-17 showing growth of roots of plants by unknown artist | [1860] |
| PT/62/3/6 | Plate, 'Graminaceous plants, supplied with known and limited quantities, of combined nitrogen, beyond that contained in the original seed' by unknown artist | [1860] |
| PT/62/3/2 | Plate, figures 1-9 showing plant pots, pans, and stoneware lutes and an apparatus for decomposition of nitrogenous organic matter by unknown artist | [1860] |
| PT/62/3/1 | Manuscript, 'On the sources of nitrogen of vegetation; with special reference to the question whether plants can assimilate free or uncombined nitrogen' by John Bennet Lawes, Joseph Henry Gilbert, and Evan Pugh | [1860] |
| RR/4/153 | Referee's report by William Benjamin Carpenter, on a paper 'On the sources of the nitrogen of vegetation; with special reference to the question whether plants assimilate free or uncombined nitrogen' by John Bennet Lawes, Joseph Henry Gilbert and Evan Pugh | 16 August 1860 |
| PT/62/3/5 | Plate, 'Graminaceous plants grown without any other supply of combined nitrogen than that contained in the original seed' by unknown artist | [1860] |
| PT/62/3 | Paper, 'On the sources of nitrogen of vegetation; with special reference to the question whether plants can assimilate free or uncombined nitrogen' by John Bennet Lawes, Joseph Henry Gilbert, and Evan Pugh | [1860] |
| MC/8/107 | Letter from J B [John Bennet] Lawes to the Royal Society | 12 November 1867 |
| RR/8/230 | Referee's report by William Turner Thiselton-Dyer, on a paper 'Agricultural, botanical, and chemical results of experiments on the mixed herbage of permanent meadow, conducted for more than twenty years in succession on the same land. — Part. II. The botanical results' by John Bennet Lawes, Joseph Henry Gilbert and Maxwell Tylden Masters | 28 October 1880 |
| MC/8 | Volume 8 of miscellaneous correspondence regarding business matters, sent to the Royal Society | 1867-1869 |
| PP/15/9 | Paper, 'New experiments on the question of the fixation of free nitrogen. (Preliminary notice.)' by John Bennet Lawes and Joseph Henry Gilbert | [1889-1890] |
| RR/4/152 | Referee's report by Lyon Playfair, on a paper 'On the sources of the nitrogen of vegetation; with special reference to the question whether plants assimilate free or uncombined nitrogen' by John Bennet Lawes, Joseph Henry Gilbert and Evan Pugh | 25 January 1859 |
| RR/4/165 | Referee's report by John Bennet Lawes, on a paper 'Account of experiments made at Holyhead (North Wales) to ascertain the transit-velocity of waves, analogous to earthquake waves, through the local rock formations' by Robert Mallet | 1 August 1861 |
| RR/8/166bis | Referee's report by John Christopher Augustus Voelcker, on a paper 'Agricultural, botanical, and chemical results of experiments on the mixed herbage of permanent meadow, conducted for more than twenty years in succession on the same land.—Part I' by John Bennet Lawes and Joseph Henry Gilbert | 15 August 1879 |
| RR/8/167 | Letter from Joseph Henry Gilbert, to George Gabriel Stokes, regarding a paper 'Agricultural, botanical, and chemical results of experiments on the mixed herbage of permanent meadow, conducted for more than twenty years in succession on the same land.—Part I' by John Bennet Lawes and Joseph Henry Gilbert | 18 November 1879 |
| RR/9/60 | Letter from Joseph Henry Gilbert, on his paper 'Agricultural, botanical, and chemical results of experiments on the mixed herbage of permanent meadow, conducted for more than twenty years in succession on the same land. — Part. II. The botanical results' by himself, John Bennet Lawes and Maxwell Tylden Masters to Joseph Dalton Hooker and William Turner Thiselton-Dyer | 3 May 1882 |
| RR/9/156 | Referee's report by John Christopher Augustus Voelcker, on a paper 'Supplement to former paper, entitled—"Experimental inquiry into the composition of some of the animals fed and slaughtered as human food.”—Composition of the ash of the entire animals, and of certain separated parts' by John Bennet Lawes and Joseph Henry Gilbert | 23 July 1883 |
| RR/9/157 | Referee's report by Arthur Gamgee, on a paper 'Supplement to former paper, entitled—"Experimental inquiry into the composition of some of the animals fed and slaughtered as human food.”—Composition of the ash of the entire animals, and of certain separated parts' by John Bennet Lawes and Joseph Henry Gilbert | 20 October 1883 |
| RR/10/185 | Referee's report by Sydney Howard Vines, on a paper 'On the present position of the question of the sources of the nitrogen of vegetation, with some new results, and preliminary notice of new lines of investigation' by John Bennet Lawes and Joseph Henry Gilbert | 7 June 1888 |
| RR/14/188 | Referee's report by Horace Tabberer Brown, on a paper 'Agricultural, botanical, and chemical results of experiments on the mixed herbage of permanent grass-land, conducted for many years in succession on the same land.—Part III. The chemical results' by John Bennet Lawes and Joseph Henry Gilbert | 15 August 1899 |