| RefNo | Title | Date |
| IM/000141 | Ashworth, James Hartley | nd |
| MM/16/112 | Letter from JH Ashworth, Edinburgh, to WB Hardy | 31 January 1925 |
| NLB/40/809 | Copy letter from Robert William Frederick Harrison to Dr J [James] H [Hartley] Ashworth, Zoological Department, The University, Edinburgh | 30 August 1909 |
| NLB/40/587 | Copy letter from Robert William Frederick Harrison to Dr J [James] H [Hartley] Ashworth | 30 June 1909 |
| NLB/69 | New Letter Book volume 69, copy letters sent from Royal Society administration | 10 December 1925-26 November 1926 |
| NLB/16/832 | Copy letter from Robert William Frederick Harrison, to J H Ashworth | 17 June 1898 |
| NLB/17/683 | Copy letter from Robert William Frederick Harrison, to James Hartley Ashworth, [Fellow of the Royal Society], Zoological Laboratories, The Owens College, Manchester | 7 December 1898 |
| NLB/38/520 | Copy letter from Robert William Frederick Harrison, to Dr [James Hartley] Ashworth, [Fellow of the Royal Society], The Zoological Department, The University, Edinburgh | 21 August 1908 |
| NLB/40/805 | Copy letter from Robert William Frederick Harrison to Dr J [James] H [Hartley] Ashworth | 30 August 1909 |
| NLB/39/354 | Copy letter from Robert William Frederick Harrison to Dr J [James] H [Hartley] Ashworth | 7 January 1909 |
| NLB/38/375 | Copy letter from Robert William Frederick Harrison, to Dr [James Hartley] Ashworth, [Fellow of the Royal Society], The University, Edinburgh | 23 July 1908 |
| NLB/39/363 | Copy letter from Robert William Frederick Harrison to Dr J [James] H [Hartley] Ashworth, Department of Zoology, The University, Edinburgh | 11 January 1909 |
| NLB/38/529 | Copy letter from Robert William Frederick Harrison, to Dr [James Hartley] Ashworth, [Fellow of the Royal Society], Zoological Department, The University, Edinburgh | 5 September 1908 |
| NLB/38/368 | Copy letter from Archibald Geikie, to Dr [James Hartley] Ashworth, [Fellow of the Royal Society], The University of Edinburgh | 22 July 1908 |
| NLB/38/583 | Copy letter from Archibald Geikie, to Dr [James Hartley] Ashworth, [Fellow of the Royal Society] | 30 September 1908 |
| NLB/40/756 | Copy letter from Robert William Frederick Harrison to Dr J [James] H [Hartley] Ashworth, Zoological Department, The University, Edinburgh | 4 August 1909 |
| NLB/63/120 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to Dr. [James Hartley] Ashworth, FRS | 30 June 1922 |
| RR/37/55 | Referee's report by James Hartley Ashworth, on a paper 'The anatomy and phylogeny of spondylus, with a particular reference to the Lamellibranch nervous system' by William John Dakin | 25 June 1928 |
| NLB/66/773 | Copy letter from William Bate Hardy, Secretary of the Royal Society; to Prof. [James Hartley] Ashworth, FRS | 5 July 1924 |
| NLB/54/440 | Copy letter from Robert William Frederick Harrison, Assistant Secretary of the Royal Society; to Dr. [James Hartley] Ashworth, FRS | 15 May 1917 |
| NLB/68/203 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to Professor [James Hartley] Ashworth, FRS | 28 May 1925 |
| RR/35/106 | Referee's report by James Hartley Ashworth, on a paper 'Induced changes in the pigmentation of the pupœ of the butterfly Pieris napi L., and their inheritance' by John William Heslop Harrison | 25 November 1927 |
| RR/17/244 | Referee's report by Frederick Walker Mott, on a paper 'The giant nerve cells and fibres of Halla parthenopeia' by James Hartley Ashworth | 1908 |
| NLB/66/703 | Copy letter from [William Bate Hardy?], Secretary of the Royal Society; to Prof. [James Hartley] Ashworth, FRS | 23 June 1924 |
| RR/38/44 | Referee's report by James Hartley Ashworth, on a paper 'Skeletal development in Arbacia, Echinarachnius and Leptasterias' by Isabella Gordon | 18 August 1928 |
| RR/36/99 | Referee's report by James Hartley Ashworth, on a paper 'Structure and function of the organs of feeding and digestion in the septibranchs, Cuspidaria and Poromya' by Charles Maurice Yonge | [June 1927] |
| RR/17/243 | Referee's report by Frederick William Gamble, on a paper 'The giant nerve cells and fibres of Halla parthenopeia' by James Hartley Ashworth | 26 June 1908 |
| RR/17/245 | Referee's report by Frederick Walker Mott, on a paper 'The giant nerve cells and fibres of Halla parthenopeia' by James Hartley Ashworth | 13 July 1908 |
| NLB/63/125 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to Dr. [James Hartley] Ashworth, FRS | 04 July 1922 |
| RR/52/96 | Referee's report by James Hartley Ashworth, on a paper 'An investigation of the post-larval development of the shore crab carcinus maenas with special reference to the external secondary sexual character' by C J Shen | 20 June 1934 |
| NLB/63/589 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to Dr. [James Hartley] Ashworth, FRS | 10 November 1922 |
| RR/53/12 | Referee's report by James Hartley Ashworth, on a paper 'Climate and tsetse flies: laboratory studies upon Glossina submorsitans and tachinoides' by Patrick Alfred Buxton and D J Lewis | 29 May 1934 |
| NLB/67/695 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to Professor [James Hartley] Ashworth, FRS | 17 February 1925 |
| NLB/67/768 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to Professor [James Hartley] Ashworth, FRS | 3 March 1925 |
| NLB/64/275 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to Professor [James Hartley] Ashworth, FRS | 5 March 1923 |
| NLB/65/185 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to Professor [James Hartley] Ashworth, FRS, President of the Zoological Section; British Association, Liverpool | 12 September 1923 |
| NLB/63/635 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to Professor [James Hartley] Ashworth, FRS | 17 November 1922 |
| NLB/65/370 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to Professor [James Hartley] Ashworth, FRS | 20 October 1923 |
| NLB/67/420 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to Professor [James Hartley] Ashworth, FRS | 17 December 1924 |
| NLB/65/911 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to Professor [James Hartley] Ashworth, FRS | 25 January 1924 |
| NLB/66/566 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to Sir Sidney [Frederic] Harmer K.B.E. FRS | 30 May 1924 |
| NLB/66/144 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to Prof. [James Hartley] Ashworth, FRS. | 1 March 1924 |
| NLB/67/123 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to Sir Dugald Clerk, KBE, FRS; also sent to [Sydney] Chapman FRS; [Frederick George] Donnan FRS; [Francis William] Aston FRS; [George Clarke] Simpson FRS; [Henry Hallett] Dale FRS; [James Hartley] Ashworth FRS; [Frederick Frost] Blackman FRS; [John Beresford] Leathes FRS | 30 October 1924 |
| NLB/67/791 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to Professor [James Hartley] Ashworth, FRS | 10 March 1925 |
| NLB/67/734 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to Sir William Leishman, KCMG, FRS | 24 February 1925 |
| NLB/68/868 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to Professor [James Hartley] Ashworth, FRS | 16 November 1925 |
| NLB/69/749 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to Prof. [James Hartley] Ashworth, FRS | 4 October 1926 |
| NLB/69/350 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to Prof. [James Hartley] Ashworth, FRS | 16 March 1926 |
| NLB/69/293 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to Prof. [James Hartley] Ashworth, FRS | 23 February 1926 |
| NLB/69/727 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to Prof. [James Hartley] Ashworth, FRS | 15 September 1926 |
| NLB/69/604 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to Prof. [James Hartley] Ashworth, FRS | 18 June 1926 |
| NLB/69/906 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to Prof. [Archibald Vivian] Hill, FRS | 12 November 1926 |
| NLB/70/595 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to Professor [James Hartley] Ashworth, FRS | 30 May 1927 |
| NLB/72/675 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to Professor [James Hartley] Ashworth, FRS | 24 February 1930 |
| NLB/69/666 | Copy letter from Henry Hallett Dale, Secretary of the Royal Society; to Prof [Herbert Wilbur] Rand, Harvard University | 12 July 1926 |
| NLB/16/349 | Copy letter from Michael Foster, to Professor Sydney J Hickson, Fellow of the Royal Society | 21 March 1898 |
| RR/35/105 | Referee's report by James Hartley Ashworth, on a paper 'A further induction of melanism in the lepidopterous Insect, Selenia biiunaria esp., and its inheritance' by John William Heslop Harrison | 25 November 1927 |
| RR/51/68 | Referee's report by James Hartley Ashworth, on a paper 'Transference of Induced food-habit from parent to offspring. Part I' by D E Sladden | 28 November 1933 |
| NLB/62/650 | Copy letter from James Hopwood Jeans, Secretary of the Royal Society; to Sir William [Henry] Bragg, FRS | 31 March 1922 |
| EC/1917/01 | Ashworth, James Hartley: certificate of election to the Royal Society | |
| RR/19/10 | Referee's report by Edward Alfred Minchin, on a paper 'On a Gregarine—Steinina rotundata, nov. sp.—Present in the mid-gut of bird-fleas of the genus Ceratophyllus' by James Hartley Ashworth and Theodore Rettie | [October 1912] |
| NLB/69/277 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to Prof. [James Hartley] Ashworth, FRS | 19 February 1926 |
| RR/14/6 | Referee's report by Walter Frank Raphael Weldon, on two papers 'The giant cells in the nerve cord of Arenicola' by Frederick William Gamble and James Hartley Ashworth, and 'The stomodaeum, mesenterial filaments, and endoderm of Xenia' by James Hartley Ashworth | 9 March 1898 |
| RR/34/2 | Referee's report by James Hartley Ashworth, on a paper 'Experiments on the egg-laying instincts of the sawfly, Pontania salicis Christ., and their bearing on the inheritance of acquired characters; with some remarks on a new principle in evolution' by John William Heslop-Harrison | [December 1926] |
| RR/34/32 | Referee's report by James Hartley Ashworth, on a paper 'Oogenesis in Oniscus asellus' by Seana D King | 27 February 1926 |
| RR/41/106 | Referee's report by James Hartley Ashworth, on a paper 'On a remarkable new nematode, Tylenchinema oscinellæ gen, et sp. n., parasitic in the frit-fly, Oscinella frit L., attacking oats' by Tom Goodey | 30 January 1930 |
| MC/17 | Volume 17 of miscellaneous correspondence regarding business matters, sent to the Royal Society | 1897-1899 |