Letter from La Société Belge d'Etudes Orientales regarding the formation of their Society and the honour to participate in the Royal Asiatic Society's Centenary celebrations. Typed letter with handwritten annotations, in French, dated 1 October 1922.
Also handwritten draft message from the L'Academie Roy de Belgique and La Société Belge d'Etudes Orientales. Handwritten, undated.

Letter from the British and Foreign Bible Society to express their congratulations on the Royal Asiatic Society Centenary. Signed by C.H.K. Boughton, Secretary.

Copy of a letter from the Royal Anthropological Institute to offer congratulations on the Royal Asiatic Society Centenary. Signed by C.G. Seligman, President.

Letter from the Philological Society to express their congratulations on the Royal Asiatic Society Centenary. Signed by Leonard C. Wharton.

Letter from the Council of the Batavia Society of Arts and Sciences to express their regret that no representative of the Society will be able to attend the Royal Asiatic Society Centenary Celebration. Signed by [J. Godikins], Secretary.

Letter from the North China Branch of the Royal Asiatic Society to offer their congratulations on the Royal Asiatic Society Centenary. Handwritten in ink with pencil annotations, undated.

Message from the Academy of Sciences in Russia and the Russian Archaeological Society to offer congratulations on the Royal Asiatic Society Centenary. Undated.

Congratulatory Certificate from Societatis Nederlandicae Orientalis on the Centenary of the Royal Asiatic Society. Undated. With presentation tube, black case with red marbled paper lining and interior label for "Eduard Ijdo, Leiden".

Letter from William MacBean George Colebrooke to Alexander Johnston to send him a rough draft of the prospectus and to say he will send the Minutes of the Proceedings the following day. He asks Johnston to give his regards to Sir William [Kingston]. The letter is handwritten, 2 sides, with further label on 4th side. The letter is now in 2 pieces.

Letter from William MacBean George Colebrooke to Alexander Johnston in which he expresses that he was pleased to be able to send the Prospectus and that he was in time for the post. He expresses regret that he was unable to make a fair copy. Handwritten, 1 side, plus a further side with address and label.