| RefNo | Title | Date |
| EC/1923/10 | Marshall, Sir Guy Anstruther Knox: certificate of election to the Royal Society | |
| RR/35/68 | Referee's report by Guy Anstruther Knox Marshall, on a paper 'On the production of silk by species of the genus Hilara meig. (Diptera)' by Harry Eltringham | October 1927 |
| NLB/64/414 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to Dr. [Guy Anstruther Knox] Marshall, FRS; 6 Chester Place, Hyde Park Square, W.2. | 9 April 1923 |
| RR/37/130 | Second referee's report by Guy Anstruther Knox Marshall, on a paper 'The North Chinese species of the genus Phlebotomus (diptera psychodidœ)' by [Walter Scott] Patton and Edward Hindle | 1928 |
| RR/37/129 | Referee's report by Guy Anstruther Knox Marshall, on a paper 'The North Chinese species of the genus Phlebotomus (diptera psychodidœ)' by W S Patton and Edward Hindle | January 1928 |
| RR/50/131 | Referee's report by Guy Anstruther Knox Marshall, on a paper 'Experimental studies in insect parasitism. II. Superparasitism' by George Salt | November 1933 |
| RR/47/52 | Referee's report by Guy Anstruther Knox Marshall, on a paper 'On the evidence against the chemical induction of melanism in lepidoptera' by Ronald Aylmer Fisher | December 1932 |
| RR/50/130 | Referee's report by Guy Anstruther Knox Marshall, on a paper 'Experimental studies in insect parasitism. I.—Introduction and technique' by George Salt | November 1933 |
| RR/65/241 | Referee's report by Guy Anstruther Knox Marshall, on a paper 'Transference of induced food-habit from parent to offspring. Ill' by D E Sladden and H R Hewer | May 1938 |
| RR/54/119 | Referee's report by Guy Anstruther Knox Marshall, on a paper 'Experimental studies in insect parasitism III—host selection' by George Salt | February 1935 |
| RR/52/81 | Referee's report by Guy Anstruther Knox Marshall, on a paper 'A hormone causing pupation in the blowfly calliphora erythrocephala' by Gottfried Fraenkel | January 1935 |
| RR/56/111 | Referee's report by Guy Anstruther Knox Marshall, on a paper 'Transference of induced food-habit from parent to offspring—II' by D E Sladden | [July 1935] |
| RR/60/64 | Referee's report by Guy Anstruther Knox Marshall, on a paper 'Studies on the embyology of the African migratory locust, Locusta migratoria migratorioides Reiche and Frm. (Orthoptera, Acrididae) II - Organogeny' by Mithan Lal Roonwal | July 1936 |
| RR/62/6 | Referee's report by Guy Anstruther Knox Marshall, on a paper 'The sense used by Trichogramma to distinguish between parasitized and unparasitized hosts' by George Salt | [November 1936] |
| NLB/64/171 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to the Under Secretary of State; Colonial Office, S.W.l. | 16 February 1923 |
| RR/67/273 | Referee's report by Guy Anstruther Knox Marshall, on a paper 'The oviposition behaviour of parasites of Plutella Maculipennis Curt' by D C Lloyd | January 1940 |
| NLB/68/16 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to Dr [Guy Anstruther Knox] Marshall, CMG, FRS | 28 April 1925 |
| NLB/64/689 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to Dr. [Guy Anstruther Knox] Marshall FRS | 2 June 1923 |
| NLB/64/457 | Copy letter from William Bate Hardy, Secretary of the Royal Society; to Sir David Orme Masson, FRS; Australian National Research Council, Royal Society's House, 5 Elizabeth Street, Sydney | 18 April 1923 |
| RR/68/224 | Referee's report by Guy Anstruther Knox Marshall, on a paper 'The structure and function of the mouth-parts, rostrum and fore-gut of the Weevil Calandra granaria L' by Ralph Dennell | [1942] |
| RR/69/295 | Referee's report by Guy Anstruther Knox Marshall, on a paper 'The influence of maternal physiology on the incidence of diapause' by F J Simmonds | 1946 |
| RR/51/69 | Second referee's report by Guy Anstruther Knox Marshall, on a paper 'Transference of Induced food-habit from parent to offspring. Part I' by D E Sladden | [December 1933] |
| NLB/67/929 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to Dr Guy Marshall, CMG, FRS | 20 April 1925 |
| NLB/67/961 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to Dr Guy Marshall, FRS | 23 April 1925 |
| NLB/68/290 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to Dr [Guy Anstruther Knox] Marshall, CMG, FRS | 12 June 1925 |
| CD/5/48 | Letter from Dr [Guy Anstruther Knox] Marshall, to Francis Alexander Towle, Assistant Secretary of the Royal Society | 11 April 1923 |
| NLB/73/368 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to Sir George Hadcock, K.B.E., FRS | 9 July 1931 |
| CD/5/46 | Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society, to Dr [Guy Anstruther Knox] Marshall, 6 Chester Place, Hyde Park Square, W.2. | 9 April 1923 |
| IM/GA/WS/2253 | Marshall, Sir Guy Anstruther Knox | 1946 |
| MC/28/197 | Letter from Guy [Anstruther Knox] Marshall, Imperial Bureau of Entomology, Head Office at British Museum (Natural History), to Sir John [Rose Bradford] | 6 June 1913 |
| RR/65/168 | Referee's report by Guy Anstruther Knox Marshall, on a paper 'A study of some factors governing the choice of hosts and distribution of progeny by the Chalcid Ooendrytus Kuvanae Howard' by D C Lloyd | March 1938 |
| RR/36/25 | Referee's report by Guy Anstruther Knox Marshall, on a paper 'The development of Chinese Leishmania in Phlebotomus major var. Chinensis and P. Sergenti var' by W S Patton and Edward Hindle | [March 1927] |
| RR/39/73 | Referee's report by Guy Anstruther Knox Marshall, on a paper 'The remarkable adaptation by which a Dipterous pupa (Tabanidae) is preserved from the danger of fissures in drying mud' by W A Lamborn | 3 December 1929 |
| RR/51/67 | Referee's report by Guy Anstruther Knox Marshall, on a paper 'Transference of Induced food-habit from parent to offspring. Part I' by D E Sladden | 2 August 1933 |
| RR/57/11 | Referee's report by Guy Anstruther Knox Marshall, on a paper 'Studies on the embryology of the African migratory locust, Locusta migratoria migratorioides R. and F. - I - The early development, with a new theory of multi-phased gastrulation among insects' by Mithan Lal Roonwal | [December 1935] |
| RR/47/67 | Referee's report by Guy Anstruther Knox Marshall, on a paper 'The climbing organ of an insect, Rhodnius prolixus (Hemiptera; Reduviidœ)' by J D Gillett and Vincent Brian Wigglesworth | June 1932 |
| MC/27/273 | Letter from [Edward Bagnall] Poulton, Wykeham House, Oxford, to [Robert] Harrison, [Royal Society] | 3 May 1912 |
| MC/31/116 | Letter from Guy [Anstruther Knox] Marshall, Director, Imperial Bureau of Entomology, British Museum (Natural History), Cromwell Road, London, S.W, to The Secretary, Royal Society, Burlington house, W | 14 June 1916 |
| MC/31/115 | Letter from Guy [Anstruther Knox] Marshall, Director, Imperial Bureau of Entomology, British Museum (Natural History), Cromwell Road, London, S.W, to The Secretary, Royal Society, Burlington house, W | 23 May 1916 |
| MC/34/131 | Letter from Guy [Anstruther Knox] Marshall, Director, The Imperial Bureau of Entomology, British Museum (Natural History), Cromwell Road, London, S.W.7., to the Assistant Secretary, Royal Society, Brlington House, W1 | 7 April 1919 |
| MC/38 | Volume 38 of miscellaneous correspondence regarding business matters, sent to the Royal Society | 1924 |
| MC/36/65 | Letter from Guy [Anstruther Knox] Marshall, Imperial Bureau of Entomology, British Museum (Natural History), Cromwell Road, London, to the Assistant Secretary of the Royal Society, Burlington House | 14 July 1922 |
| MC/34/130 | Letter from Guy [Anstruther Knox] Marshall, Director, The Imperial Bureau of Entomology, British Museum (Natural History), Cromwell Road, London, S.W.7., to the [Assistant] Secretary, Royal Society, Brlington House, W1 | 13 January 1919 |