Letter from the 5th Earl of Cranbrook to Dr Chris Hails on the Earl's proposal to monitor urban swallow roosts in Sarawak

Letter from the 5th Earl of Cranbrook to Dr E. Nugroho requesting for a bibliography of his work. The Earl also if he could suggest contacts in KalBar

Letter from the 5th Earl of Cranbrook to Dr E. Nugroho thanking for his books. The Earl offered to exchange with him UK published books

Letter from the 5th Earl of Cranbrook to Dr E. Stresemann enclosing "Synonymy based on Peters (1940)"

Letter from the 5th Earl of Cranbrook to Dr Herbet G. Deignan on switlets from Java and other parts of Asia

Letter from the 5th Earl of Cranbrook to Dr J. H. Becking on Collocalia gigas from Central West Malaysia that tohis surprise, did not echolocate. He wanted to withdraw his tentative placing of this species in the paper in Proc. Lin. Soc. withdrawn

Letter from the 5th Earl of Cranbrook to Dr J. Th. Koster enclosing part of his draft paper on swiftlets of Java. He requested her to check the marked portion of the draft. Attached: (i) Dr J. Th. Koster's reply; (ii)"Estimation of the bryophte and pteridophyte content of birds' nests submitted by Lord Medway of the Sarawak Museum"

Letter from the 5th Earl of Cranbrook to Dr James Monk informing him he was sending the manuscript for "The swiftlets of Niah, Sarawak: part 2: ecology and the regulation of breeding" [Manuscript is in Manuscripts section]

Letter from the 5th Earl of Cranbrook to Dr James Reichel giving him contacts of people working on the same research

Letter from the 5th Earl of Cranbrook to Dr Jean Dorst concerning the obituary notice for Prof J. Berlioz who was an honorary member of the British Ornithologists' Union. He also mentioned page 74 of L'Echo du Monde Savant published in 1837