| Reference number | Title | Date |
| EC/1902/10 | Kidston, Robert: certificate of election to the Royal Society | |
| RR/16/73 | Referee's report by Dukinfield Henry Scott, on a paper 'The fructification of Neuropteris heterophylla' by Robert Kidston | 29 November 1903 |
| RR/16/74 | Referee's report by Albert Charles Seward, on a paper 'The fructification of Neuropteris heterophylla' by Robert Kidston | December 1903 |
| RR/16/228 | Referee's report by Robert Kidston, on a paper 'The structure and affinities of fossil plants from the palaeozoic rocks. V. A new type of sphenophyllaceous cone (sphenophyllum fertile) from the lower coal measures' by Dukinfield Henry Scott | January 1904 |
| NLB/23/2/440 | Copy letter sent from Joseph Larmor, to Robert Kidston, Fellow of the Royal Society | 24 February 1904 |
| NLB/67/137 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to Dr [Dukinfield Henry] Scott, FRS | 1 November 1924 |
| NLB/27/659 | Copy letter from Robert William Frederick Harrison, to Robert Kidston, Fellow of the Royal Society | 10 November 1903 |
| NLB/31/125 | Copy letter from Robert William Frederick Harrison, to Robert Kidston, Fellow of the Royal Society | 27 June 1905 |
| NLB/32/377 | Copy letter from Robert William Frederick Harrison, to Robert Kidston, Fellow of the Royal Society | 1 March 1906 |
| NLB/33/319 | Copy letter from Robert William Frederick Harrison, to Robert Kidston, Fellow of the Royal Society, Stirling | 2 August 1906 |
| NLB/32/699 | Copy letter from Robert William Frederick Harrison, to Robert Kidston, Fellow of the Royal Society | 10 May 1906 |
| NLB/36/571 | Copy letter from Robert William Frederick Harrison, to Messrs Harrison & Sons | 15 November 1907 |
| NLB/37/567 | Copy letter from Robert William Frederick Harrison to Professor F [Francis] W [Wall] Oliver, Fellow of the Royal Society, Chairman of the Botany Sectional Committee | 6 April 1908 |
| NLB/42/23 | Copy letter from Robert William Frederick Harrison to Robert Kidston | 8 March 1909 |
| NLB/42/171 | Copy letter from Robert William Frederick Harrison to Robert Kidston FRS, 12 Clarendon Place, Striling, NB | 18 April 1910 |
| NLB/41/773 | Copy letter from Robert William Frederick Harrison, to Robert Kidston, Fellow of the Royal Society | 23 February 1910 |
| NLB/42/70 | Copy letter from Robert William Frederick Harrison to M E de Wildeman, Scretariat General, Jardin Botanique, Brussels | 19 March 1910 |
| NLB/42/174 | Copy letter from Robert William Frederick Harrison to M Van der Vaeren, Jardin Botanique, Brussels, Belgium | 19 April 1910 |
| NLB/45/87 | Copy letter from Robert William Frederick Harrison to Dr R [Robert] Kidston FRS | 19 December 1911 |
| NLB/45/32 | Copy letter from Robert William Frederick Harrison to Dr Robert Kidston FRS | 11 December 1911 |
| NLB/48/632 | Copy letter from Robert William Frederick Harrison, to Dr Robert Kidston, Fellow of the Royal Society | 14 August 1913 |
| RR/17/116 | Referee's report by Robert Kidston, on a paper 'On the structure of Sigillaria scutellata, Brongn., and other Eusigillarian stems, in comparison with those of other Palaeozoic lycopods' by E. A. Newell Arber and Hugh Hamshaw Thomas | 29 November 1907 |
| NLB/68/72 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to Professor [William Henry] Lang, FRS | 8 May 1925 |
| RR/16/249 | Referee's report by Robert Kidston, on a paper 'Some new species of lagenostoma: A type of pteridospermous seed from the coal measures' by E A Newell Arber | February 1905 |
| RR/19/133 | Referee's report by Robert Kidston, on a paper 'Petrifactions of the earliest European angiosperms' by Marie Stopes | [March 1912] |
| RR/22/113 | Referee's report by Robert Kidston, on a paper 'On williamsoniella, a new type of bennettitalean flower' by Hugh Hamshaw Thomas | July 1915 |
| NLB/68/336 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to Professor [William Henry] Lang, FRS | 22 June 1925 |
| RR/16/330 | Referee's report by Albert Charles Seward, 'The microsporangia of the pteridospermeae, with remarks on their relationship to existing groups' on a paper by Robert Kidston | December 1905 |
| NLB/32/95 | Copy letter from [Robert William Frederick Harrison], to Professor Harry Marshall Ward, Fellow of the Royal Society | 22 December 1905 |
| RR/17/224 | Referee's report by Robert Kidston, on a paper 'On the present distribution and origin of the calcareous concretions in coal seams, known as "coal balls"' by M C Stopes and David Meredith Seares Watson | [July 1907] |
| RR/16/329 | Referee's report by Francis Wall Oliver, on a paper 'The microsporangia of the pteridospermeae, with remarks on their relationship to existing groups' by Robert Kidston | December 1905 |
| RR/16/331 | Referee's report by Dukinfield Henry Scott, on a paper 'The microsporangia of the pteridospermeae, with remarks on their relationship to existing groups' by Robert Kidston | 7 February 1906 |
| RR/17/223 | Letter from Robert Kidston, regarding a paper 'On the present distribution and origin of the calcareous concretions in coal seams, known as "coal balls"' by M C Stopes and David Meredith Seares Watson | 13 July 1907 |
| RR/18/104 | Referee reports and a letter from Robert Kidston, on a paper 'On the fossil flora of the forest of Dean Coalfield (Gloucestershire), and the relationships of the Coalfields of the West of England and South Wales' by E A Newell Arber | 12 December 1911 |