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11th International Ornothilogical Congress

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Correspondence relating to arrangements for Haldane and Helen Spurway's attendance at the 11th International Ornothilogical Congress held in Basel, Switzerland, 29 May - 5 June 1954. Primarily consists of correspondence between the conference organisers and Haldane's secretary regarding fees and accomodation arrangements, and between Haldane's secretary and Thomas Cook & Son Ltd regarding travel arrangements.
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Includes handwritten drafts and typescript copies of papers on the estimation of bird death rates by Haldane; timetables for Air France, British Railways and British European Airways and two copies of the Congress announcements.

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11th International Ornothilogical Congress

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