Scope and Contents Earlier material consists of correspondence and reports relating to the 16th International Congress of Zoology, Washington (20-27 August 1963), which, in the event, Waddington was unable to attend. The material also contains correspondence with the National Academy of Sciences, Washington, the Office of Science and Technology, and Dr Caryl P. Haskins, Carnegie Institute of Washington. Later correspondence covers the period after Waddington's return from the US, when he followed up on his...