General correspondence with various institutions, including the Worshipful Company of Clockmakers, 1949-1954; the National Benevolent Society of Watch and Clock Makers, 1954; the Junior Astronomical Society, 1953; Dr Merriman, Institute of Metallurgists, 1953; the Société Chronométrique de France, 1953; the Royal Institute of Chartered Surveyors, 1953; Sir Giles Gilbert Scott and the Clockmakers Company, concerning the Guildhall Reconstruction Gallery Clock, 1952; the Royal Society of Arts, 1952; the Cambridge University Astronomical Society, 1950-1951; and Arthur C. Clarke, British Interplanetary Society, 1951.