Correspondence and papers from a folder labelled, 'Astronomical Optics Symposium'. Material is regarding the International Symposium on Astronomical Optics and Related Subjects, 19-22 April 1955, University of Manchester.
Letters are filed alphabetically by person or organisation, including: requests to various academics for papers; attendees; publicising the event, and so forth.
Proceedings of the symposium were edited by ZK and published as, Astronomical Optics and Related Subjects by the North Holland Publishing Company, Amsterdam, in 1956.
Folder 1 - Letters A-F; Folder 2 - G-P, Folder 3 - R-Z.