Some collections have at times gone missing. The administrative documents concerning these incidents are found in this series.
- Letter from Simon Digby, Honorary Librarian, concerning a missing Mughal painting. Typed, 1 piece, dated 12 July 1973.
- Correspondence, reports and photographs concerning the theft of three 18th or early 19th century Burmese Buddhist statues. Handwritten, typed, and 2 colour photographs, 13 pieces, dated 21 September 1977 - 25 April 1989.
- Correspondence concerning missing books belonging to John Hansman. Typed, 5 pieces, dated 6 December - 31 December 1979.
- Correspondence, reports, lists and agreements concerning over 130 books missing from the Library in 1997, and relevant incidents at British Library and the Bodleian in 2007. Five archival folders, dated 1997-2009.
- Report by Kathy Lazenbatt, Royal Asiatic Society Librarian, delivered to the Historic Libraries Forum, concerning theft. Typed, 4 pieces, dated 17 November 2009.