Letter from the 5th Earl of Cranbrook to Wong Kho Pee concerning the Earl's recording of buildings in Miri with swiftlet nests

Letter from the Acting Conservator of Forests, Peter F. Burgess to the 5th Earl of Cranbrook concerning bird nest counts at Kg Gelam mossy nest cave

Letter from the Acting Conservator of Forests, Peter F. Burgess to the 5th Earl of Cranbrook, c/o the Sarawak Museum, Kuching, Sarawak, concerning bird nest counts at Kg Gelam Cave

Letter from the Assistant Secretary of the Royal Society to the 5th Earl of Cranbrook stating that the Earl would be given the grant from the Scientific Investigations Grant-in-aid

Letter from the Earl of Cranbrook to Tom Harrisson with title 'Subis Cave'. The letter concerned a human skeleton as well as conditions of the site

Letter from the Editor, The Emu, S. Marchant to the 5th Earl of Cranbrook telling him he would publish his article. Attached: "The nest of Collocalia v. vanikorensis, and the taxonomic implications" with Marchant's comments

Letter from the the 5th Earl of Cranbrook to Dr Povel concerning his WOTRO-project proposal: "Evolution of the orientation system of the echolocating edible-nest swiftlet and the non-echolocating linchi and giant swiftlet of Java, Indonesia (Aves: Apodidae: Collocaliini) in cave (-like) habitats"

Letter from the the 5th Earl of Cranbrook to Ho Coy Choke saying that he (the Earl) might visit Kota Kinabalu at the end of Feb 2000

Letter from the the 5th Earl of Cranbrook to Lim Chan Koon concerning Lim's observations on nests of Aerodramus fuciphagus

Letter from the the 5th Earl of Cranbrook to Professor Ho Coy Choke, University of Malaya on a research project on swiftlets. He mentioned he would be sending further details of Dr Clayton's proposals