Correspondence with Rao Bahadur, Professor Dr. S. Krishnaswami Aiyangar, Editor of "Journal of Indian History", Madras. These are:

Letter to Col Hoysted, Secretary, Royal Asiatic Society, to suggest asking Aiyangar as an alternative person to represent the Society at the Conference. The writer of the letter thinks this will not need to be sanctioned by the Council as his name had been considered before. Dated 25 April 1939.

Letter from Col. Hoysted, Secretary, Royal Asiatic Society, to Dr Aiyangar to ask if he would be willing to represent the Society at the All-India Conference. Dated 26 April 1939.

Letter from Dr Aiynagar to Col. Hoysted to state that he will represent the Society and has been in touch with the Local Secretary of the Conference concerning this. Dated 22 June 1939.

Letter from Dr Aiynagar to Col. Hoysted to state that he knew of the change of venue but that he still intended to attend the conference and would therefore represent the Society. Dated 20 February 1940.

The 9th International Congress of Orientalists was held in London in 1892. This material includes minute books, correspondence and printed material concerning the conference.

The 16th International Congress of Orientalists was held in Athens in 1912. The material consists of the Fifth Bulletin for the Congress detailing the Organising Committee, Programme and participants. This pamphlet has uncut pages.

At the International Congress held in Athens in 1912, it was proposed that the next Congress be held in Oxford in 1915. This was then postponed to September 1916. However the hostilities of World War One led to the discussion of the appropriateness of holding an International Congress. The material within this series consists of correspondence concerning that discussion. They are:

• "Extract from a letter from Professor Sylvain Lévi to Sir George Grierson, dated February 19th 1915" in which he writes of the difficulties of organising an international congress at that time and offers some alternatives.
• "Extract from a letter from Professor Sylvain Lévi to Sir George Grierson, dated 2 February 1916" and a note concerning Grierson's reply. The letter expresses Lévi's concerns and the possibility of a Congress with only allied nations involved.
• "Extract from a letter from Professor Sylvain Lévi to Sir George Grierson, dated April 1, 1916" in which he writes concerning the possibility for involvement of some organisations including the Royal Asiatic Society, the Pali Text Society, the Institut de France, the British Academy and the Royal Society.
• Letter from [Sir George Grierson] to potential attendees of a meeting fixed by Lord Reay of those being consulted about Sylvain Lévi's letters. Dated 10 May 1916. With this letter are copies of correspondence to Grierson from Professor T.W. Rhys Davids of Pali Text Society, Dr. J.F. Fleet, Dr F.W. Thomas, and F.E. Pargiter expressing their opinions, dated 22 March - 10 May 1916.

The 20th International Congress of Orientalists was held in Brussels in September 1938. The material connected to this congress is:

• Letter from Dr G. Ryckmans, Institut Orientaliste de l'Université de Louvain, to the Director of the Journal of the Royal Asiatic Society to inform that the place of the forthcoming conference is likely to be in Brussels. Handwritten with printed letterhead, dated 17 December 1937.
• Letter from Col. Hoysted, Secretary, Royal Asiatic Society, to Dr. G. Ryckmans, Institut Orientaliste de l'Université de Louvain, to thank for his letter and warning about the 20th Congress and to state that he had cancelled the prepared statement for the Journal of the Society. Typed, dated 8 January 1938.
• "Première Circulaire" for the 20th Congress to state that it will be held in Brussels from 5-10 September 1938. Printed in French with handwritten annotations, dated January 1938.
• Letter from Jean Capart, Secretary-General, and L. de la Vallée Poussin, President, Organising Committee, to invite a delegate from the receiving organisation. Printed in French with handwritten annotations, dated 10 February 1938.
• "Deuxième Circulaire" for the 20th Congress giving administrative information and providing a form to subsribe to the "Bulletin D'Inscription". Printed in French, dated April 1938.
• "Troisième Circulaire" for the 20th Congress giving more detailed logistical information. Within the circular is a "Bulletin D'Inscription" form partially completed for Louise Wallace Hackney. Printed in French with handwritten annotations, dated June 1938.
• Letter from Louise Wallace Hackney to Colonel Hoysted to state that she had completed and sent a form previously. She is unsure where she will be staying for the Congress. Handwritten, dated 17 July 1938.
• Letter from Thomas Cook and Son Ltd., to Colonel Hoysted to send copies of an itinerary for arrangements for the 20th Congress. Typed, dated 20 July 1938. The itinerary is with the letter.
• Letter from Col. Hoysted to Thomas Cook and Sons Ltd. to thank for the details of their tour to Brussels for the International Congress. Typed, dated 21 July 1938.
• Letter from Thomas Cook and Son Ltd., to Colonel Hoysted to ask whether a venue and date for the next Congress had been decided at the Brussels conference. Typed, dated 21 September 1938.
• Letter from Col. Hoysted to the Secretary General, XXth International Congress of Orientalists, to ask whether any arrangements of the place and date of the 21st Congress had been made. Typed, dated 4 October 1938.
• Letter from Col. Hoysted to Thomas Cook and Sons Ltd. to state he was unable to give any information concerning the 21st Congress. Typed, dated 20 October 1938.

The 21st International Congress of Orientalists was held in Paris in July 1948. Material associated with this Congress is:

• "Première Circulaire" from J. Bacot, President of the Societé Asiatique concerning the 21st Congress to be held in Paris. Printed in French, undated.
• "Deuxème Circulaire" from J. Bacot, President, and R. Grousset, Secretary-General, Organising Committee, concerning details of the 21st Congress. Printed in French, undated.
• "Bulletin d'Adhésion" for the 21st Congress. Printed in French, undated.

The 23rd International Congress of Orientalists was held in Cambridge in 1954. The material connected with this Congress includes correspondence concerning organising and finance of the Congress, correspondence regarding attendance, General programme, correspondence regarding the publication of the Proceedings of the Conference and a further research enquiry.

Correspondence concerned with delegates attending the Congress. These are:

• Letter from Hans R. Roemer, Deutsche MorgenLandische Gesellschaft, to the Royal Asiatic Society to inform of delegates coming to the Congress. Typed, dated 6 July 1954.
• Letter from Meer S. Basri to Mrs Davis, Royal Asiatic Society, to ask for a confirmatory letter of his attendance at the Congress so he may obtain a visa. Typed, dated 14 July 1954.
• Letter from Denis Sinor, Organising Committee, to Mrs Davis, Royal Asiatic Society, concerning leaflets advertising the Congress and her offer of help for the Congress. Typed, dated 21 July 1954.
• Letter from Secretary, Royal Asiatic Society, to the Permanent Under-Secretary of State, to confirm Meer S. Basri's attendance at the Congress. Typed, dated 22 July 1954.
• Letter from Vivian Gaster to Royal Asiatic Society to ask to become a member of the Congress. Handwritten, dated 1 August 1954.
• Letter from Meer S. Basri to Mrs Davis, Royal Asiatic Society, to inform that he has obtained his visa. Handwritten, dated 16 August 1954.
• Letter from President, Royal Asiatic Society, to delegates at the Congress to invite them to become members of the Royal Asiatic Society. Typed, undated.