Official and general correspondence regarding the Nautical Almanac Office, including letters concerning equipment, staff, prices of almanacs and reports of meetings. The papers include the following items:
Memorandum by D.H. Sadler regarding the 'Bicentenary of the Publication of the First Nautical Almanac', 1962.
Correspondence concerning the proposed replacement of the 1201 computer, 1961.
Memorandum by D.H. Sadler on the work of H.M. Nautical Almanac Office, 1957.
Report on the visit to the U.S.A. and Canada by Mr and Mrs Sadler in October-November 1956.
Memorandum on the 'Explanatory Supplement' to the Astronomical Ephemeris and the American Ephemeris, 1956.
Memorandum by D.H. Sadler on the 'Selection of stars for Astronomical Navigation', 1950.
Memorandum regarding the abridged 'Nautical Almanac' of 1952, relating to Pole Star tables, 1950.
Revision of the abridged 'Nautical Almanac' final specimen pages by D.H. Sadler, 1949.
Correspondence concerning an air almanac, 1948-1949.
Report by Flora M. McBain on a 'Discussion of Occultations observed in 1946', 1949.