A set of proofs of abstracts for a CIBA Meeting on 'The Biophysics and Biochemistry of Viruses', including Crick and Watson, "Virus Structure: General Principles."
The file also contains Crick and Watson's abstract as a typescript, and a mimeograph copy of Caspar, "The structure of bushy stunt virus."
Caspar's paper does not appear amongst the abstracts, but Judson, The Eighth Day of Creation (1996) notes (p. 315): "At the end of March 1956 ... Crick was back in London for a three-day symposium on the nature of viruses, organized by the Ciba Foundation. Watson and Don Caspar came along from Cambridge, too. It was not a vast meeting - thirty-four scientists - but the sponsors had brought people from as far as Australia, South Africa, and California ... To that audience, Crick presented, as the first paper on the first day, the general principles of virus structure that he and Watson had worked out in the previous six months."