Correspondence regarding the Herstmonceux Conference of 1965, including the following items:

Correspondence with the Royal Society.

Correspondence with H.J. Helms, Head of the N.A.T.O. Pure Science Bureau.

Correspondence with the Hydrographer of the Navy.

Details of the International Summer Course on Observational Aspects of Galactic Structure held at Athens on 9-23 September 1964.

Correspondence with M. Schmidt of the California Institute of Technology, Pasadena.

Correspondence with G. Preston of the Lick Observatory, California.

Correspondence with D. Lynden-Bell.

Correspondence with F. Hoyle.

Correspondence with L. Rosino of the Observatorio Astrofisico, Asiago, Italy.

Correspondence with W. Becker of the Astronomisch-Meteorologische Anstalt der Universität Basel, Binningen, Switzerland.

Correspondence with J. Lequex of the Observatoire de Meudon, France.

Correspondence with A.N. Eskioglu of the Astronomical Institute of the University of the Harvard College Observatory, Cambridge, Massachusetts.

Correspondence with P.A. Wayman of the Dunsink Observatory, Co. Dublin, Ireland.

Correspondence with Mrs P. Pishmish da Recillas of the Observatorio Astronómico Nácional de México.

Correspondence with Beverly T. Lynds of the Stewart Observatory, University of Arizona.

Correspondence with S.C.B. Gascoigne of the Mount Stromlo Observatory.

Correspondence with D. Mihalas of the Princeton University Observatory, New Jersey.

Correspondence with K.O. Murra of the Library of Congress, Washington D.C.

Correspondence with A. Busacca of the Instituto de Scienze Fisiche, Milan, Italy.

Correspondence with R. Cayrel of the Institut d'Astrophysique, Université de Liège, Belgium.

Correspondence with W.W. Shane of the University Observatory, Leiden, Netherlands.

Correspondence with M.G. Pereira de Barros, Observatório Astronómico, Universidade do Porto, Portugal.

Correspondence with A.R. Upgren, Jr., of the United States Naval Observatory, Washington D.C.

Correspondence with the Elsevier Publishing Company, Amsterdam, Netherlands.