Miscellaneous correspondence:

Correspondence with D.R. Hartree, 1929-1936, concerned mainly with calculating machines and their use for a mathematics department of a university.

Correspondence with Major M. Hotine of the Ordnance Survey, Southampton, 1935-1936, concerned principally with the reductions of star observations carried out by the Nautical Almanac Office.

Correspondence with T.C. Hudson, 1927-1937, relating mainly to outside work undertaken by him.

Correspondence with W.S. Hughes, Sussex, 1935, regarding his suggestions for alterations to calculations of the Moon's place.

Correspondence with the Institute of Civil Engineers, 1929-1933, concerning requests for copies of the 'Nautical Almanac' for their library and the tracing of an engineer named Carden-Lloyd.

Correspondence with H. Jeffreys, St John's College, Cambridge, 1934-1939, regarding perturbations of Jupiter and Saturn over long periods, calculating machines and the best make-up for arithmetical tables.

Correspondence with the Ordnance Board, principally J.W. MacColl, 1939-1942, concerning the installation of their new machine, the cost of maintenance, various programmes, and various tables for use in ballistics.

Correspondence with K. and E.H. Pearson, 1932-1937, regarding L.J. Comrie's report on Pearson's tables, Comrie's public lectures on calculating machines, and the calculation of tables by the Nautical Almanac Office.

Correspondence with B.M. Peek, 1934-1941, regarding computations of satellites of Saturn and Jupiter, tables of reduction and periodic phenomena.

Correspondence with H.H. Plaskett, Royal Air Force, Boscombe Down, 1933-1941, regarding papers for a Royal Astronomical Society meeting, work for A. and A.E.E. on periodogram analysis, and various tables for the 'Air Almanac'.

A letter from W.M. Whitehall, Royal Observatory, to D.H. Sadler, 11 October 1939, on the correspondence of E.C. Trupp.