The Royal Asiatic Society of Sri Lanka was incorporated soon after its foundation as an affiliated society to the Royal Asiatic Society of Great Britain and Ireland. This material covers some of the interaction between the two societies. These are:

• "The 125th Anniversary of The Royal Asiatic Society (Ceylon Branch)" by P.R. Sittampalam, Honorary Secretary - photocopy of an article from the Journal of the Ceylon Branch of the Royal Asiatic Society.
• Letter from Kunst and Wissen, Germany, to the Royal Asiatic Society to ask the address of the publishers of the the Journal of the Ceylon Branch of the Royal Asiatic Society. Typed, dated 16 April 1970.
• Letter from F. Sprangers, Belguim, to Royal Asiatic Society asking for a sample issue of the Journal of the Royal Asiatic Society (Ceylon Branch). Handwritten, dated August 1974. Also the reply from Royal Asiatic Society to give address of the Ceylon Branch. Typed, dated 9 September 1974.
• Letter from Audrey Meenan, Serials Department, British Library, to Miss Crawford, Secretary, Royal Asiatic Society, to ask for confirmation of the address of the Ceylon Branch of the Royal Asiatic Society. Typed, dated 24 July 1976.
• Letter from Wilfred M. Gunasekara, Honorary Joint Secretary, Royal Asiatic Society (Sri Lanka Branch), to the President, Royal Asiatic Society, to thank for the donation of the book, "The Royal Asiatic Society - Its History and Treasures". Typed, dated 25 September 1980.
• Letter from Faxon to the Royal Asiatic Society to ask concerning the address of the Royal Asiatic Society, Sri Lanka Branch. Typed, dated 16 December 1983.
• Letter from Wilfred M. Gunasekara, Honorary Joint Secretary, Royal Asiatic Society (Sri Lanka Branch), to the Secretary, Royal Asiatic Society, to ask for a copy of the letter of incorporation of the Ceylon Branch. Typed, dated 13 January 1985. With this is a copy of the reply to state that no letter is in existence and also the Minutes books are temporarily in store while the Society's buildings are being renovated. Handwritten, dated 31 January 1985.
• Letters expressing concern regarding the possible new incorporation of the Royal Asiatic Society (Sri Lanka Branch) with the Royal Asiatic Society from H. W. Weeraratne, dated 16 November 1985; Harold Weevaratne, dated 21 November 1985; and H.W. Weeraratne, dated 9 December 1985.
• Letter from the Honorary President, Royal Asiatic Society Sri Lanka Branch, to the Honorary Secretary, Royal Asiatic Society, to inform that the incorporation will entail the name of the Society becoming the Royal Asiatic Society of Sri Lanka. Typed, dated 22 January 1986.
• Letter from the Honorary Joint Secretary, Royal Asiatic Society of Sri Lanka, to the Secretary, Royal Asiatic Society, to inform of the dispatch of two publications as complimentary copies for the Royal Asiatic Society. Typed, dated 20 June 1990.
• Correspondence between Michael Pollock, Librarian, Royal Asiatic Society, and Dr Somapala Jayawardhana, Honorary Joint Secretary, Royal Asiatic Society of Sri Lanka, concerning copies of the Journal of Royal Asiatic Society of Sri Lanka for the Royal Asiatic Society's Collections. Nine letters, typed, dated from 18 May 1992 - 7 September 1993. Also 4 postcards of receipt.
• Correspondence between Michael Pollock, Librarian, Royal Asiatic Society, and B.E. Wijesuriya, Administrative Assistant for the Honorary Treasurer, Royal Asiatic Society of Sri Lanka, concerning obtaining copies of the Sesquicentennial Commemorative Volume of the Royal Asiatic Society of Sri Lanka. Two letters, typed, dated 25 April - 30 May 1995. With these letters is a printed pamphlet advertising the Commemorative Volume.
• Letter from Michael Pollock, Librarian, Royal Asiatic Society, to G.P.S.H. de Silva, Secretary, Royal Asiatic Society of Sri Lanka, to inform of the death of Professor Charles Fraser Beckingham, who was an Honorary Fellow of the Royal Asiatic Society of Sri Lanka. Typed, dated 12 November 1998.
• Correspondence concerning the visit of Mr R. Wijedasa of the Royal Asiatic Society of Sri Lanka to the Royal Asiatic Society. Four letters, typed, dated 18 May 2003 - 30 July 2003.

A letter of correspondence from Edmund Rowland Jayathilake Gooneratne to the Reverend Arthur Stanley Bishop in which he writes that he will be glad to look over Gogerl'y papers that Bishop is preparing to publish. Handwritten, 2 sides, dated 19 August 1907. The folded sheet has a printed letterhead 'Yatha Pracna Statha Vibhawah.' 17.6cmX11.3cm.

A letter of correspondence from Charlotte Hughes, RAS Secretary, to the Reverend Arthur Stanley Bishop in which she writes that she cannot answer Stanley Bishop's questions as they do not have the Gogerly works in question. Handwritten, 2 sides, dated, October 3, 1907. The folded sheet has a printed letterhead 'Royal Asiatic Society, 22 Albemarle Street London, W.' 17.5cmX11.2cm.

A letter of correspondence from Charlotte Hughes, RAS Secretary, to the Reverend Arthur Stanley Bishop, to include a letter from Professor Arnold of the India Office (see DJG/15/2). Handwritten, 2 sides, dated October 11, 1907. The folded sheet has a printed letterhead 'Royal Asiatic Society, 22 Albemarle Street London, W.' 17.5cmX11.2cm.

A letter from the Reverend Arthur Stanley Bishop, to accompany a prospectus for the publication of Gogerly's Buddhist translations. Printed, 1 side, dated 26 June, 1908 in Colombo. There is a further handwritten sheet listing Gogerly's published translations of various Theravāda Buddhism scriptures. 6.5cmX21cm and approx. 27.2cmX22cm.

A letter of correspondence from Edmund Rowland Jayathilake Gooneratne to the Reverend Arthur Stanley Bishop in which he thanks Stanley Bishop for the first volume of Gogerly's writings and makes some editorial suggestions. Handwritten, 2 sides, dated July 3, 1908. The folded sheet has a printed letterhead 'Yatha Pracna Statha Wibhawah.' 17.7cmX11.3cm.