| Reference number | Title | Date |
| EC/1923/02 | Balls, William Lawrence: certificate of election to the Royal Society | |
| RR/29/62 | Referee's report by William Lawrence Balls, on a paper 'The composition of the cell-wall at the apical meristem of stem and root' by R M Tupper-Carey and J H Priestley | May 1923 |
| RR/21/18 | Referee's report by Alfred Daniel Hall, on a paper 'Analyses of agricultural yield. Part I.—The spacing experiment with Egyptian cottom, 1912' by William Lawrence Balls and Francis S Holton | 25 May 1914 |
| RR/22/7 | Referee's report by Alfred Daniel Hall, on a paper 'Analyses of agricultural yield. Part II - The showing-date experiment with Egyptian cotton, 1913' by William Lawrence Balls | 16 March 1915 |
| RR/27/7 | Referee's report by Henry Horatio Dixon, on a paper 'Further observations on cell-wall structure as seen in cotton hairs' by William Lawrence Balls | March 1922 |
| RR/27/8 | Referee's report by Henry Reginald Arnulph Mallock, on a paper 'Further observations on cell-wall structure as seen in cotton hairs' by William Lawrence Balls | 18 March 1922 |
| RR/28/60 | Referee's report by Henry Horatio Dixon, on a paper 'The determiners of cellulose structure as seen in the cell-wall of cotton hairs' by William Lawrence Balls | [April 1923] |
| RR/22/6 | Referee's report by David Prain, on a paper 'Analyses of agricultural yield. Part III. —The influence of natural environmental factors upon the yield of Egyptian cotton' by William Lawrence Balls | 11 January 1916 |
| RR/44/35 | Referee's report by Edward John Russell, on a paper 'Analyses of agricultural yield. Part IV. - Water-table movements on a farm in Egypt' by William Lawrence Balls and M A Zaghloul | September 1931 |
| RR/22/9 | Referee's report by Henry Nicholas Ridley, on a paper 'Analyses of agricultural yield. Part II - The showing-date experiment with Egyptian cotton, 1913' by William Lawrence Balls | May 1915 |
| RR/22/8 | Referee's report by Francis Darwin, on a paper 'Analyses of agricultural yield. Part II - The showing-date experiment with Egyptian cotton, 1913' by William Lawrence Balls | 24 March 1915 |
| RR/22/5 | Referee's report by Vernon Herbert Blackman, on a paper 'Analyses of agricultural yield. Part III. —The influence of natural environmental factors upon the yield of Egyptian cotton' by William Lawrence Balls | 21 December 1915 |
| RR/26/7 | Referee's report by Charles Vernon Boys, on a paper 'A simple apparatus for approximate harmonic analysis and for periodicity measurements' by William Lawrence Balls | [May 1921] |
| RR/32/19 | Referee's report by Frederick Frost Blackman, on a paper 'Measurements of the reversing spiral in cotton hairs' by William Lawrence Balls and H A Hancock | August 1925 |
| NLB/64/543 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to Dr. [William Lawrence] Balls, FRS | 02 May 1923 |
| NLB/67/878 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to Dr [William Lawrence] Balls, FRS | 30 March 1925 |
| NLB/68/551 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to Professor [Vernon Herbert] Blackman, FRS | 6 August 1925 |
| NLB/52/576 | Copy letter from Robert William Frederick Harrison, Assistant Secretary of the Royal Society; to Professor John Bretland Farmer, Chairman of the Botany Committee and FRS | 18 January 1916 |
| RR/44/34 | Referee's report by Henry George Lyons, on a paper 'Analyses of agricultural yield. Part IV. - Water-table movements on a farm in Egypt' by William Lawrence Balls and M A Zaghloul | 28 January 1932 |
| RR/21/19 | Referee's report by Francis Darwin, on a paper 'Analyses of agricultural yield. Part I.—The spacing experiment with Egyptian cottom, 1912' by William Lawrence Balls and Francis S Holton | 5 June 1914 |
| AP/81/1 | Unpublished paper, 'Cotton - air - moisture testing (the CAM-test)' by W [William] Lawrence Balls | [1939-1944] |
| AP/81/1/1 | Unpublished manuscript, 'Cotton - air - moisture testing (the CAM-test)' by W [William] Lawrence Balls | [1939-1944] |
| AP/81/1/2 | Unpublished diagrams, experimental apparatus and results by William Lawrence Balls | [1939-1944] |
| RR/28/130 | Referee's report by William Lawrence Balls, on a paper 'The influence of rainfall on the yield of wheat at Rothamsted' by Ronald Aylmer Fisher | [October 1923] |