Letter from Sapuan Haji Ahmad verifying that the bearer of the letter, Mr Lim Chan Koon was conducting research on edible nest swiftlets with Sarawak Forest Department for period 1997 to 1998

Letter from Sarawak Adm. Officer to Ag. Curator, Sarawak Museum stating there was no such statistics available in his/her office

Letter from Sarawak Administrative Officer to Curator, Sarawak Museum statting that the birdnest collectors would collect the nests at Niah Cave starting from 1970/07/15

Letter from Secretariat of CITES [Convention on International Trade in Endangered Species] concerning the Workshop on Edible-nest Swiftlets of the Genus Collocalia to be held in Surabaya from 4-7 November 1996. Enclosed were the provsional agenda and working programme

Letter from Stanley Cobb to the 5th Earl of Cranbrook on his correspondance with Hollander. He also mentioned about sending his manuscript to the Earl

Letter from the 5th Earl of Cranbrook to A. Hoogerwerf informing he had sent reprints on the swiftlets of Indonesia to him. The Earl also mentioned the confusion with the taxonomy of the swiftlets of Indonesia

Letter from the 5th Earl of Cranbrook to A. Hoogerwerf on the taxonomy of the swiftlets of Indonesia

Letter from the 5th Earl of Cranbrook to Amar James Wong Kim Min (Minister for Environment & Housing, Sarawak, Malaysia) on pollution of cave at Skiat Baru, Bau

Letter from the 5th Earl of Cranbrook to Anthony Cheke on swiftlets from Mascarenes, Seychelles and Mauritius

Letter from the 5th Earl of Cranbrook to Ben King commenting on his manuscript on the waterfall swift, Hydrochrus gigas [manuscript in Manuscripts section]