Correspondence with the Admiralty and the Treasury regarding the Nautical Almanac Office and its reorganisation, staffing, structure, pay, sales, prices and changes in the layout of its publications:

Correspondence relating to proposed changes in the structure and layout of the 'Nautical Almanac', 1903-1904, including notes on the differences between the 'Nautical Almanac', 'Connaissance de Temps' and 'Berliner Jahrbuch' and proposals that lunar distances be omitted from the 'Nautical Almanac' in the future and alternative astronomical data on ephemeris, parallaxes, and occultations be included.

Correspondence, 1911-1926, regarding proposed changes to the 'Nautical Almanac' resulting from discussions at the Paris Conference, October 1911, and general enquiries. The changes relate to staffing, work done and publications, including suggestions that the day begin at 00.00 midnight and that the N.A.O. be amalgamated with the Royal Observatory. The enquiries include where the 'Nautical Almanac' can be purchased and how much it costs.

General correspondence concerning the reorganisation and changes at the N.A.O., 1923-1936, including copies of committee and conference minutes regarding the N.A.O. and correspondence relating to the construction of an occultation machine by the Royal Observatory for the N.A.O.