Correspondence with Lady Lockyer concerning the storage of Royal Observatory chronometers at her house in Sidmouth for the duration of the war, 1940.

Correspondence with Professor Greaves of the Royal Observatory, Edinburgh, concerning the transportation of chronometers from Greenwich to Edinburgh for safety during the war, 1940.

Correspondence with His Majesty's Chronometer Depot concerning arrangements for the removal of stocks of Admiralty navigational equipment from Bristol Depot due to enemy bombing in the war, 1940.

Correspondence with the Hydrographer of the Navy concerning the possibility of using the St Loyes Training Centre, Exeter, for chronometer repairs and adjustments, 1940 (twelve chronometer watches were sent for repair to test the workmanship, which was found to be of poor quality).

Correspondence with A. Johannsen and Co. concerning the loss of three Royal Observatory chronometers (Isaac 1855, Keys 974 and Usher & Cole 2190) in the bombing in which the workshops of A. Johannsen and Co. were completely destroyed, 1940.

'A report on correspondence from the British Admiralty Technical Mission, Ottawa, enclosing offers made by Longines Wittnauer Watch Co. Ltd of New York' to make and deliver chronometers, 1940.

Correspondence with the Hydrographer of the Navy detailing the disposition of chronometer stocks of the Royal Observatory, 16 September 1940.

Correspondence with C. Gent, horologist, declining his offer to supply chronometers, 1940.

Correspondence with the Hydrographer of the Navy concerning the salvage and repair of chronometers from enemy aircraft shot down in England, 1940.

Report on a visit to the Royal Aircraft Establishment in Hampshire, 1940.

Correspondence with the Hydrographer of the Navy concerning plans to take chronometers up on aircraft test flights, 1940.

Report on a visit to the St Loyes training centre, Exeter, 1940.

Correspondence with His Majesty's Chronometer Depot and a report on the purchase of watches and chronometers, 1940.

Report on chronometers and watches lost and/or stolen during the removal to Bristol of all chronometer work formerly undertaken at the Royal Observatory, 1940.

Report on outstanding orders for watches and chronometers and prospective purchases, 1940.

Correspondence with the Hydrographer of the Navy concerning tests of watches in low temperatures, 1940.

Correspondence with the Hydrographer of the Navy concerning problems of delivery with regard to chronometers ordered from Switzerland and the rapid depletion of chronometer stocks due to war, 1939.

Report on chronometer purchases, 12 December 1939.

Report on watch purchases during 1939.

Correspondence with the Hydrographer of the Navy concerning the alteration of times when chronometers may be applied for or issued, 1901.

Correspondence concerning revised instructions for the packing of chronometers, 1904.

Correspondence with the Hydrographer of the Navy prohibiting the repair of chronometers being carried out abroad, 1905.

Application from W. Lidgvist for an old unused chronometer movement for an experiment, 1906.

Letter from the Hydrographer of the Navy informing the Astronomer Royal of a new chronometer depot on Sheerness, 1908.

Correspondence with the Admiralty concerning the supply and testing of chronometers to Navy destroyers for use in wireless telegraphy, including notes on the chronometer test rates, 1907.

Correspondence with the Hydrographer of the Navy concerning the shortage of chronometers ready for issue at the Royal Observatory, 1909.

Correspondence with the Hydrographer of the Navy and the horologists A. Webb and J. Travers concerning the poor state of the chronometer trade and the increasing scarcity of professional clockmakers, 1909-1911, including rough notes on the importance of Admiralty work and its bearing on the chronometer trade.

Correspondence with the Hydrographer of the Navy concerning the supply of non-magnetic watches to submarines and the tests of various watches aboard submarines, 1910-1911.

Correspondence with the Hydrographer of the Navy and H. White and Sons concerning a chronometer submitted by them as being suitable for use in submarines, 1910, including results of tests made on the specimen chronometer.

Correspondence with the Hydrographer of the Navy concerning the numbers and classification of all chronometers at the Royal Observatory in 1911.

Correspondence with the Hydrographer of the Navy concerning an advertisement by Messrs Hurcomb in the 'Jeweller and Metal Worker' containing disparaging statements concerning the Royal Observatory Annual Trial of Chronometers for purchase by the Navy, 1911.

Correspondence with the Hydrographer of the Navy concerning proposed alterations in procedures for dealing with Admiralty chronometers and watches, 1911.

Correspondence with the Hydrographer of the Navy concerning the trial of cheap metal watches to be used in surveying ships as Tide Watches, 1911.

Correspondence with the Admiralty concerning the regulations relating to chronometers and watches and the fixing of prices, 1912.

Query from the Hydrographic Department as to whether any foreign-made chronometers or watches were entered in the trials, 1913.

Correspondence with the Hydrographer of the Navy, 1913, concerning a proposal to purchase 150 hack watches during 1913-1915 and the settlement of a premium as an inducement to makers of watches.

Correspondence with the Hydrographer of the Navy concerning the number of hack watches in stock at the Royal Observatory and instructions for their issue, 1914.

Correspondence with the Hydrographer of the Navy concerning the selection of chronometers for ships, 1914.

Correspondence with the Hydrographer of the Navy concerning the disposal of 'B' class chronometers, 1914.

Correspondence with the Hydrographer of the Navy concerning the suggestion from various sources that all watches purchased in future should have centre second hands, 1914.

Correspondence with the Hydrographer of the Navy, 1914, concerning an increase in the number of hack watches to be kept in store from 1914.

Notice from the Astronomer Royal to all persons issued with chronometers instructing them to keep them away from electric machines, 1914.

Correspondence with the Hydrographer of the Navy concerning the purchase of non-magnetic watches, 1914.

Correspondence concerning a query from the Hydrographic Department on the age limit of chronometers afloat, 1914.

Instruction from the Hydrographer of the Navy to fit India rubber studs to the base of all chronometer boxes, 1914.

Correspondence with the Hydrographer of the Navy concerning revised instructions for the unpacking and restarting of chronometers at their destination, 1914.