The 28th International Congress of Orientalists was held in Canberra, Australia, in January 1971. The material within these papers includes administrative correspondence, possibilities of affinity flights and transport of the drinking horn.
The administrative correspondence is:

• Letter from A.L. Basham to Secretary, Royal Asiatic Society, to send his subscription and to inform that the Society would soon be receiving its official announcement of the 28th Congress. Handwritten, dated 29 May 1969.
• Letter from Rafe de Crespigny, Secretary-General, International Congress, to send the Announcement and Poster for the 28th Congress. Typed, undated. The printed Announcement is with the letter.
• Letter from Secretary, Royal Asiatic Society, to Rafe de Crespigny, Secretary-General, International Congress, to thank for the Announcement and to suggest he contacts A.L. Basham for further help. Typed, dated 5 November 1969.
• Letter from Jean Filliozat to Royal Asiatic Society to state that he would ensure their letter is delivered. Handwritten in French, dated 17 March 1970.
• Letter from Rafe de Crespigny, Secretary-General, International Congress, to Secretary, Royal Asiatic Society, to ask if the Society could give any help with arranging affinity flights to the Congress. Typed, dated 10 March 1970.
• Letter from Secretary, Royal Asiatic Society, to Sir Harold Bailey to ask his advice on the Secretary-General's letter and the Society's involvement in organising transport. Typed, dated 24 March 1970.
• Letter from Secretary, Royal Asiatic Society, to Rafe de Crespigny, Secretary-General, International Congress, to confirm their support for the Congress and to ask regarding arrangements for hospitality in Australia. Typed, dated 13 April 1970.
• Second Invitation and Enclosures for the 28th International Congress. Printed material, undated.
• Notice from Secretary, Royal Asiatic Society, to fellows to ask whether they would be interested in subscribing to charter or affinity flights for the conference. Typed, dated April 1970.
• Letter from Rafe de Crespigny, Secretary-General, International Congress, to Secretary, Royal Asiatic Society, to thank for the support and provide information regarding accommodation in Halls of residence. Typed, dated 20 April 1970.
• Letter from L.P. Elwell-Sutton to Secretary, Royal Asiatic Society, to ask to be kept informed regarding flights. Typed, dated 26 May 1970.
• Letter from Rafe de Crespigny, Secretary-General, International Congress, to Secretary, Royal Asiatic Society, to send a list of delegates. Typed, dated 8 June 1970. With this letter is an Alphabetical List of Delegates from U.K. and Ireland. Computer generated, dated 28 May 1970.
• Letter from Rafe de Crespigny, Secretary-General, International Congress, to D.W. Anthony, British Association of Orientalists, regarding the possibility of proposed shared flights. Typed, dated 10 July 1970.
• Correspondence between Henry G. Schwarz and Secretary, Royal Asiatic Society, concerning the possibility of affinity flights. Two letters, typed, dated 25 July - 6 August 1970.
• Letter from Professor S. Morag to Dr Anthony concerning the possibility of affinity flights. Typed, dated 31 July 1970.
• Correspondence between Professor J. Aquilina and Secretary, Royal Asiatic society, concerning affinity flights. Two letters, typed, dated 20 August-2 September 1970.
• Letter from M. Gatehouse to Secretary, Royal Asiatic Society regarding the tightened regulations for affinity flights. Typed, dated 8 September 1970.
• Correspondence between L.S. Leshnik and the Royal Asiatic society concerning the possibility of affinity or group flights. Two letters, typed, dated 16 November - 27 November 1970.
• Correspondence between Louis Allen and Royal Asiatic Society regarding affinity flights. Two letters, typed, dated 23 November - 27 November 1970.
• Correspondence between Professor S. Morag and the Secretary, Royal Asiatic Society, concerning the possibility of affinity flights and that one would not be happening. Two letters, handwritten and typed, dated 30 November - 29 December 1970.

There is further correspondence with W.F. & R.K. Swan (Hellenic Ltd.), Qantas, Kearsley Travel, Thomas Cook and Son Ltd., and Trans-Australia Airlines regarding the possibilities of organising an affinity flight. Nine items, typed, dated 8 June - 13 November 1970.

Correspondence regarding the drinking horn is:

• Letter from Mary Hutchinson, the Australian National University, to Miss Crawford, Secretary, Royal Asiatic Society, to ask on behalf of Professor Basham the whereabouts of the drinking horn and whether it might be possible for it to be present at the Canberra Congress. Typed, dated 27 October 1970.
• Letter from Sun Alliance & London Insurance Group to confirm that the drinking horn will be insured whilst in transit to Canberra. Typed, dated 11 December 1970.
• Letter from Miss Crawford, Secretary, Royal Asiatic Society, to Mary Hutchinson, the Australian National University, to inform that the drinking horn is at the Royal Asiatic society and that Professor E.H.S. Simmonds will be bringing it to the Congress. Typed, dated 14 December 1970.
• Insurance policy from The Westminster Fire Office for the drinking horn. Printed with typed inserts, dated 15 December 1970.
• Statement from B.W. Robinson to state that the drinking horn is being taken by Simmonds to the Congress and will be returned to the United Kingdom afterwards. Typed, dated 16 December 1970.
• Letter from Secretary, Royal Asiatic Society, to Sun Alliance & London Assurance Group to enclose a cheque to cover the insurance of the drinking horn. Typed, dated 21 December 1970

The 27th International Congress of Orientalists was held in Ann Arbor, Michigan, USA, in August 1967. The material concerned with this Congress includes administrative correspondence and organisation for the drinking horn (see RAS ICO/1) to be at the Congress.

The 26th International Congress of Orientalists was held in New Delhi in 1963. These papers concern preparatory organisation. They are:

• Letter from the International Union of Orientalists to the Royal Asiatic Society to enclose the minutes of their meeting in Tokyo, October 1961, and the statutes of the Union. They ask for the Society's to remit their quota to enable the work towards the next Congress. Typed, dated 3 May 1962.
• Letter from the International Union of Orientalists to the Royal Asiatic Society to follow up on their letter of 3 May as they had not yet received a reply from the Society. Typed, dated 3 July 1962.

The 25th International Congress of Orientalists was held in Moscow in August 1960. The material associated with this Congress is:

• First Circular for the XXVth International Congress of Orientalists from B.G. Gafurov, Chairman, and I.M. Diakonoff, Secretary, Organising Committee, giving details of the dates and sections for the Congress. Printed in Russian and English, undated.
• Second Circular from the Organising Committee to give further organisational information regarding the Congress. Printed in Russian and English, undated. With the circular is an application form for attendance at the Congress, also printed in Russian and English.
• Announcement from the Royal Asiatic Society of the 25th International Congress with the sections and registration fee. Printed, dated September 1959.
• Application form to attend the Congress. Printed in Russian and English, undated.
• Notice of flights to and hotels in Moscow. Typed with handwritten annotations, undated.
• List of British delegates for the Congress. Typed, undated.
• Letter from the International Union of Orientalists to the Royal Asiatic Society to invite the Society to take part in the General Assembly at the forthcoming Congress. Typed, dated 8 July 1960.
• Letter from Denis Sinor to Mrs Davis, Royal Asiatic Society, to ask her to make sure that the Society's subscription is paid to the International Union of Orientalists. Typed, dated 11 July 1960.

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.

The 22nd International Congress of Orientalists was held in Istanbul in September 1951. The material associated with this Congress is:

• Letter from Professor A.J. Arberry, Chairman of the Executive Committee, Association of British Orientalists, to Societies and Institutions to seek their opinion on the proposal to constitute an International Federation of Orientalist Societies which is to be included in the Agenda of the forthcoming 22nd Congress. Opinions gathered will be used to affect any decision taken by the Association of British Orientalists regarding the project. Typed, dated 5 May 1951.

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 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 19th International Congress of Orientalists was held in Rome in September 1935. The material from this Congress is:

• "First Communication" from Dr Vittore Pisani, Secretary, Organising Committee, to inform of the date of the forthcoming Congress to be held in Rome from 23-29 September 1935. Typed with handwritten annotations, dated March 1935.
• "Extract from Minutes of Council 11 April 1935" which states that Professor Margoliouth will represent the Society when the invitation comes for the Congress. Handwritten.
• Letter from Henriette Devonshire to Colonel Hoysted, Secretary, Royal Asiatic Society, to inform him that she has not yet made contact with Mrs Friend. She asks if she may consider herself a delegate from the Royal Asiatic Society at the forthcoming International Congress of Orientalists where she will be delivering a paper on The Upkeep of Islamic Monuments in Cairo. She asks for Hoysted to send an article from the Journal. Handwritten, dated 26 April 1935.
• Letter from Col. Hoysted to Mrs. Devonshire to reply to her letter. He hopes she will meet Mrs Friend in the autumn, and that she must consider herself a delegate of the Royal Asiatic Society. He encloses an offprint of the journal article she requested. Typed, dated 7 May 1935.
• Second Communication from Dr Vittore Pisani, Secretary, Organising Committee for the 19th International Congress of Orientalists, giving details of fees and transport suggestions. With the communication is a list of hotels and a form to order accommodation. Printed, dated May 1935.
• Letter from Col. Hoysted, Secretary, Royal Asiatic Society, to The Secretary, XIX International Congress of Orientalists, to inform that the Council have appointed their President, Professor Margoliouth, as the official representative. Typed, dated 8 May 1935.
• Letter from Col. Hoysted, Secretary, Royal Asiatic Society, to The Secretary, XIX International Congress of Orientalists, to thank for the Second communication and ask for the third communication and details. Typed, dated 12 June 1935.
• Letter from Henriette Devonshire to Colonel Hoysted, Secretary, Royal Asiatic Society, to ask for a further article to be sent to her. Handwritten, dated 25 June 1935.
• Letter from Col. Hoysted, Secretary, Royal Asiatic Society, to The Secretary, XIX International Congress of Orientalists, to inform that other members of the Society will also be present at the conference including Mrs R.L. Devonshire. Typed, dated 9 July 1935.
• Letter from Dr T de Somaggi to Col. Hoysted to write a report concerning the Congress of Rome as many English friends were unable to be present because of the Anglo-Italian political tension. Handwritten, dated 23 October 1935.
• Lidzbarski Trust Medal presented to Nikolaus Rhodokanakis at the International Oriental Congress in Rome, 1935. The medal was presented at the conferences for work in epigraphy. Boxed medal with head, name and dates of Lidzabarski on front and inscription on reverse.

In 1926, the possibility of an International Congress was raised again. The material in this series consist mainly of correspondence between Émile Senart and Edward S.M. Perowne. They are:

• Letter from Émile Senart to Edward Perowne concerning Senart's discussion with F.W. Thomas and the possible involvement of the Royal Asiatic Society. Handwritten in French, dated 23 October 1926.
• "re Oriental Congress, Note of Interview with Mr Émile Senart at la Ferte Bernard, 2 November 1926" by Edward Perowne concerning Senart's suggestion for the restarting of the Congress of Orientalists. Typed, dated 30 October 1926 [Note, dates do not match].
• "Translation of letter subsequently written by me from Paris to Mr Senart" by Edward Perowne, to clarify the points concerning the forming of an Oriental Congress. Typed, dated 5 November 1926.
• Letter from Émile Senart to Edward Perowne in which he responds to the proposal laid out in Perowne's previous letter. Handwritten, dated 8 November 1926. With this letter is a typed translation made by Perowne. * Translation of a letter from Edward Perowne to Émile Senart in which he writes of his discussions with Mr Thomas and that the Royal Asiatic Society has yet to discuss their views regarding an Oriental Congress and to clarify points raised by Senart. Typed, dated 11 November 1926.
• "Memorandum for a Meeting of the Entente Committee" sent out by F.W. Thomas to announce the meeting called to discuss a notice issued by the Dutch Oriental Society announcing its oriental congress in 1927 and the possibility of reviving the International Congress of Orientalists. Typed, dated 14 December 1926. With this memorandum are typed copies of the correspondence and meetings between Perowne and Senart for 2 November, 5 November, 8 November and 11 November 1926.
• Letter from S.M. Edwardes, Secretary, Royal Asiatic Society, to The Secretary, Oestersch Genootschap in Nederland, to relate the concerns of the Council of the Royal Asiatic Society concerning the procedure of reviving the International Oriental Congress. Typed, undated.