The move of the Society from Queen's Gardens necessitated the sale of some furniture and curtains. This material includes correspondence with The Curtain Exchange, Lloyds International Auction Galleries, and Christie's. It also includes a Catalogue for Christie's Auction of Furniture and Decorative Objects held on 11 October 2005, when some of the Society's furniture was in the sale.

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.

Notifications, Agendas and Minutes of Meetings of the Sesquicentenary Planning Committee. Includes some signed minutes. The Sesquicentenary Committee was established to oversee the organisation of the celebrations. The first meeting was held on 27 November 1968. They continued to meet even after the Sesquicentenary to administer the funds and give a progress report. In the Minutes for 9 January 1975, it was noted that arrangements were approved for the dissolution of the Committee on 19 February 1975.

Administrative lists concerned with the organisation of the Sesquicentenary celebrations. These are:

• "Sesquicentenary Committee", 1972-1973
• "Sesquicentenary Celebrations 1973" - Committee, 1971, 1974/5
• "Synopsis" - sheet of plans and events
• "Social Occasions" - listing Dinner, Reception and Concert
• "Summary of Minutes Concerning Exhibitions"
• "Appeals" listing fund-raising ideas
• "1973 Tentative Calendar of Events"
• "Royal Asiatic Society" - listing items within the Collections
• "Sesquicentenary" - summarising the different components of the celebrations
• "Sesquicentenary Reception" - Proposed list of guests - 2 versions

Printed material to advertise the Royal Asiatic Society and list the Events for its Sesquicentenary Celebrations.

Visitors' Book for the Sesquicentenary Reception containing the signatures of the guests including those of Her Majesty the Queen and HRH The Duke of Edinburgh.

Correspondence with Ring & Brymer (Birch's) Ltd concerning catering for the Sesquicentenary Dinner. These are:

• Letter from Ring & Brymer (Birch's) Ltd. to Miss Crawford, Secretary of Royal Asiatic Society, to enclose suggestions for the Dinner Menu, dated 21 May 1973.
• Letter from Miss Crawford, Secretary of Royal Asiatic Society, to Ring & Brymer (Birch's) Ltd to ask that they be booked for that date and the choice of menu, dated 29 June 1973.
• Letter from Ring & Brymer (Birch's) Ltd. to Miss Crawford, Secretary of Royal Asiatic Society, to confirm they have received the booking, dated 3 July 1973.
• Letter from Miss Crawford, Secretary of Royal Asiatic Society, to Ring & Brymer (Birch's) Ltd to confirm various points regarding the meal, dated 19 October 1973.
• Invoice from Ring & Brymer (Birch's) Ltd. to Miss Crawford, Secretary of Royal Asiatic Society, for the cost of the Dinner, dated 25 October 1973.

Correspondence with Barnard & Crannis Ltd. regarding printing. These are:

• Letter from Secretary, Royal Asiatic Society, to Barnard & Crannis to send particulars of the menu and a specimen copy of an earlier event menu. A copy of the particulars is with the letter, 4 pieces, dated 10 October 1973.
• Letter from Secretary, Royal Asiatic Society, to Barnard & Crannis to return the proofs and give some amendments. Copies of the proofs are with the letter. 5 pieces, dated 17 October 1973.

Two copies of the printed programme for the Sesquicentenary Symposium and including an Introduction by the Chairman, priced at 50p.

Correspondence with Buckingham Palace. Correspondence between the Royal Asiatic Society and Commander W.B. Willett, Buckingham Palace, concerning the Duke of Edinburgh taking Presidency of the Symposium. These are:

• Letter from B.W. Robinson, President of Royal Asiatic Society to Commander Willett, Buckingham Palace, to inquire whether the Duke of Edinburgh would accept the Presidency of the Symposium, undated.
• Letter from Commander Willett, Buckingham Palace, to B.W. Robinson, President of Royal Asiatic Society, to state that the Duke of Edinburgh would be delighted to accept the Presidency but would be unable to attend due to prior commitment, dated 15 May 1973.
• Letter from A.D.H. Bivar, Director of Royal Asiatic Society, to Commander Willett, Buckingham Palace, to send the Society's thanks for the Duke of Edinburgh accepting the Presidency and to inform of the reception at the Foreign Office on 25 July, dated 22 May 1973.
• Letter from Commander Willett, Buckingham Palace, to A.D.H. Bivar, Director of Royal Asiatic Society, to state that the Duke of Edinburgh will be unable to attend the reception, dated 29 May 1973.
• Letter from A.D.H. Bivar, Director of Royal Asiatic Society, to Commander Willett, Buckingham Palace, to send a draft welcoming statement for the approval of the Duke of Edinburgh, dated 2 July 1973.
• Letter from Commander Willett, Buckingham Palace, to A.D.H. Bivar, Director of Royal Asiatic Society, to send the welcome message from the Duke of Edinburgh. The message is with this letter. Dated 24 July 1973.
• Letter from A.D.H. Bivar, Director of Royal Asiatic Society, to Commander Willett, Buckingham Palace, to thank for the message from the Duke of Edinburgh and report on the warm reception it received, dated 2 August 1973.