In 1939 the Royal Swedish Academy of Sciences celebrated its bicentenary. These papers consist of a printed invitation to the Royal Asiatic Society to send delegates to the celebration and correspondence regarding this. These are:

• "The Royal Swedish Academy of Sciences 1739-1939". Official invitation to the Royal Asiatic Society to send one or more delegates to the celebration of their 200th anniversary from 23-25 September 1939. Printed material with handwritten insertions, undated.
• Letter from Col. Hoysted, Secretary, Royal Asiatic Society, to The President, Royal Swedish Academy of Sciences, to state that the invitation will be laid before the Council at its next meeting. He asks for further information regarding the venue. Typed, dated 24 April 1939.
• Letter from Col. Hoysted, Secretary, Royal Asiatic Society, to Rev. C.T. Harley Walker to inform him that he had been unanimously chosen to represent the Society at the Royal Swedish Academy of Sciences' bicentenary. Typed, dated 10 May 1939.
• Letter from Col. Hoysted, Secretary, Royal Asiatic Society, to Professor Bernhard Karlgreen to inform him that he had been unanimously chosen to represent the Society at the Royal Swedish Academy of Sciences' bicentenary. Typed, dated 10 May 1939.
• Letter from Rev. C.T. Harley Walker to the Royal Asiatic Society to express his honour at being chosen to represent the Society. He also asks whether there might be some help with the expenses for attending the celebrations. Handwritten, 3 pages, dated 15 May 1939.
• Letter from Col. Hoysted, Secretary, Royal Asiatic Society, to Mr Perowne, Solicitor, concerning Rev. C.T. Harley Walker being asked to represent the Society and how Hoysted should respond to his letter. Handwritten, dated 17 May 1939.
• Letter from Edward Perowne, Solicitor, to Col. Hoysted, Secretary, Royal Asiatic Society, to state that the letter should be put before the Council. His view as Honorary Treasurer was that no money should be given. Typed with printed letterhead, dated 22 May 1939.
• Letter from Col. Hoysted, Secretary, Royal Asiatic Society, to Rev. C.T. Harley Walker to state that he would reply to his enquiry after the next Council meeting. Typed, dated 23 May 1939.
• Letter from Professor Bernhard Karlgreen to Col. Hoysted, Secretary, Royal Asiatic Society, to state that he would be honoured to represent the Society. Handwritten with printed letterhead, dated 30 May 1939.
• Letter from Col. Hoysted, Secretary, Royal Asiatic Society, to Rev. C.T. Harley Walker to inform him that the Council regrets that it will be unable to make a contribution towards travelling expenses. Typed, dated 14 June 1939.
• Letter from Col. Hoysted, Secretary, Royal Asiatic Society, to The President, Royal Swedish Academy of Sciences, to state that the Society's delegate will be Professor Bernhard Karlgreen. Typed, dated 15 June 1939.
• Letter from Professor D.S. Margoliouth, President, Royal Asiatic Society, to Col. Hoysted, Secretary, Royal Asiatic Society, to state that one representative of the Society will be sufficient. Handwritten with printed letterhead, dated 5 July 1939.
• Letter from Rev. C.T. Harley Walker to the Royal Asiatic Society to state that he will not be able to travel to Sweden for the bicentenary celebrations. Handwritten, 2 pages, dated 14 July 1939.
• Letter from Col. Hoysted, Secretary, Royal Asiatic Society, to Rev. C.T. Harley Walker to express his regrets that Walker will be unable to represent the Society. Typed, dated 17 July 1939.

Correspondence between Royal Society for Asian Affairs and the Royal Asiatic Society. These are:

• Correspondence between Helen McKeag, Secretary, Royal Society Asian Affairs, and Dr D.W. MacDowall, President, Royal Asiatic Society, concerning a proposed commemoration of the 250th birth of Sir William Jones. There are 3 letters, dated 2 November 1995 to 30 January 1996 and a list of "Arrangements for the Commemoration of the Birth of Sir William Jones" on 6 February 1996.
• Letter from Professor Anthony Stockwell, President, Royal Asiatic Society, to Lord Denman, President, Royal Society for Asian Affairs, to write on behalf of the Society to send congratulations on the one hundredth birthday of the Royal Society for Asian Affairs. Typed, dated 14 May 2001.
• Correspondence with Lord Denman, President, Royal Society for Asian Affairs concerning his visit to the Royal Asiatic Society on 27 November 2001. 4 letters, typed and handwritten, dated 14 November 2001 - 14 December 2001.
• Letter from Norman Cameron, Secretary, Royal Society for Asian Affairs, to Adrian Thomas, Secretary, Royal Asiatic Society, to thank him for the visit to the Society's premises and concerning the premises requirements of the Royal Society for Asian Affairs. With the letter are plans of their current premises. Typed with printed letterhead, dated 9 January 2002.
• Correspondence regarding meeting with Sir Harold Walker, President, Royal Society for Asian Affairs, and members of the Royal Asiatic Society. Copies of emails and letters, 6 pieces, dating 24 April - 2 June 2002.
• Correspondence regarding the possibility of the two Societies sharing premises. Three letters, dated 13 July 2002 - 23 July 2002.
• Letter of invitation from Norman Cameron, Secretary, Royal Society for Asian Affairs, to Professor Anthony Stockwell, President, Royal Asiatic Society, to the launch of the publication "Strolling About on the Roof of the World". Typed with handwritten annotations, dated 10 September 2002.
• Letters from Norman Cameron, Secretary, Royal Society for Asian Affairs, to Professor Anthony Stockwell, President, Royal Asiatic Society, concerning the bid for a grant from the Heritage Lottery Fund by the Royal Society for Asian Affairs. Two letters, typed with printed letterhead, dated 12 November 2002 - 14 March 2003.
• Correspondence concerning a letter written by Harold Walker to the Secretary of State. Emails and letters, 4 pieces, dated 22-23 July 2003.
• Letter from Francis Robinson, President, Royal Asiatic Society, to Harold Walker, President, Royal Society for Asian Affairs, to thank for the letter of congratulations sent by Harold Walker on Francis Robinson becoming President. Typed with printed letterhead, dated 19 August 2003.
• Letter from Alison Ohta, Curator, Royal Asiatic Society, to Georgina Nayler, Director, The Pilgrim Trust, in support of the Royal Society of Asian Affairs' application for a grant to assist the computerisation of the book catalogue. Typed, with letterhead, dated 6 October 2007.

An invitation from the President, Council and Fellows of the Royal Geographical Society to invite a delegate from the Royal Asiatic Society to represent the Society at the Royal Geographical Socety's Centenary on 21 October 1930 and the succeeding two days. Signed by Arthur R. Hinks, Secretary, and C.F. Close, President.

Material from the Royal Central Asian Society. These are:

• "Afternoon Party of the Royal Central Asian Society in association with the Royal Asiatic Society, the Anglo-Arab Association(1961), the China Society, the Iran Society, and the Middle East Association, to be held at Hurlingham Club, Fulham, S.W.6 from 4 to 6.30 p.m. on Wednesday 17 July 1963." Printed material listing members of each Society who would be present.
• Letter from Sir Gilbert Laithwaite, former Chairman of Royal Central Asian Society, to Charles Beckingham, Royal Asiatic Society to ask his advice on an enclosed letter from the Commonwealth Office to the Royal Central Asian Society. Typed with printed letterhead, dated 3 September 1968. With the letter is a copy of the Commonwealth Office letter to Sir Esler Dening, dated 10 May 1968.
• Letter from Sir Gilbert Laithwaite, former Chairman of Royal Central Asian Society, to Charles Beckingham, Royal Asiatic Society, concerning the possibility of a closer working relationship between the two Societies. Typed with printed letterhead, dated 31 October 1968.

In 1973 the Royal Asiatic Society celebrated its Sesquicentenary (150 years). The archival material includes Planning committee administration; material connected with the various events held, exhibitions put on and publications produced in celebration of the occasion; and material concerned with fundraising for the Society.

The Royal Asiatic Society leased 74 Grosvenor Street from 1920 to 1947. These papers include those for the negotiation of taking up the lease, for possibility lease of different premises, for wartime damage insurance contributions, for the expediency of leaving the premises. There is also a photograph of 74 Grosvenor Street of unknown date.

The Royal Asiatic Society rented rooms at 73 Collier Street from 2005-2006 while alterations were made at the newly purchased 14 Stephenson Way property. Items from this rental are:

• Plan of the rooms to be rented, dated 24 June 2005.
• Letter from Mark Winkler, Beaumont & Co., to Alison Ohta, Royal Asiatic Society, to set out the proposed head of terms for occupation of the rooms at 73 Collier Street, dated 30 June 2005.
• Licence Agreement between Manchester Square Properties Ltd. and the Royal Asiatic Society regarding the rental of the rooms for the time period 14 July 2005-13 July 2006. Signed and dated 13 July 2005.
• Letter from Alison Ohta, Curator, Royal Asiatic Society, to The Manager, Lloyds TSB Bank, Baywater Branch, to agree payment to Manchester Square Properties Ltd., dated 13 July 2005.
• "List of Furniture to take to Collier Street" - inventory of furniture, undated.
• "Notification of Change of Address from Queen's Gardens to 73 Collier Street - 2 printed cards.