Correspondence regarding meetings, lectures and other matters relating to various scientific institutions, including the following items:

Correspondence with the National Physical Laboratory on time comparisons by Telstar, 1962.

Correspondence with Dr Keil of the Deutsche Gesellschaft für Chronometrie on the International Congress, 1959.

Correspondence with Réne Baillaud and minutes of a meeting of La Commission Internationale de Coordination des Travaux des Observatoires Chronométrique, 1951-1958.

Correspondence with the National Physical Laboratory, 1958.

Correspondence with the Society for Visiting Scientists, 1957.

Correspondence with the Atomic Energy Authority, Harwell, 1956.

Correspondence with Dr Follett of the Science Museum regarding the Planetarium, 1955.

Correspondence with the British Horological Institute, 1954.

Correspondence with the National Physical Laboratory, H. Spencer Jones and Cox, Hargreaves and Thomson Ltd, 1952, concerning the design of mirror for a standard barometer, including a diagram.

Correspondence with the National Maritime Museum, the Science Museum, A. Lloyd, the Royal Society and the Private Secretary to Queen Mary regarding the British Clockmaker's Heritage Exhibition, 1951-1952,

Correspondence with the Association of Optical Practitioners and the British Horological Institute, 1951.