Part of email from Prof Soekarja Somadikartato on the taxonomy of swiftlets

Part of letter from Dermot M. Smyth to to the 5th Earl of Cranbrook on echolocation of different species of swiftlets and the structure of syringes of Aerodramus spodiopygius and Collocalia esculenta

Part of letter from the 5th Earl of Cranbrook to Chris Hails concerning the Earl's work in Malaysia. The Earl also mentioned his intention to write a book on swiftlets

Part of prospectus of University of Aberdeen expedition to Seychelles, summer 1977 [attached to the letter dated 1977/09/25 from Michael Cook to the 5th Earl of Cranbrook]

Photo of a gate at the enrance of a cave, with notes at the back. It accompanied the letter dated 1983/03/28 from Ibau Ding to the 5th Earl of Cranbrook concerning the gate of the cave built in 1979 with the Earl's advice on horizontal bars

Postcard from Betsy Garrett Bang to Tom Harrisson concerning number of specimens required

Postcard from Richard King to the 5th Earl of Cranbrook telling him he had no knowledge of edible nests traded in China

Programme instructions from the 5th Earl of Cranbrook to the Curator of Sarawak Museum

Provisional prospectus for a six-month Oxford University zoologial expedition to the Andaman Islands: bibliogarphy on birds in general [re: Letter from Michael Rands to the 5th Earl of Cranbrook dated 1982/01/25]

Provisional prospectus for a six-month Oxford University zoologial expedition to the Andaman Islands: general [re: Letter from Michael Rands to the 5th Earl of Cranbrook dated 1982/01/25]