(1) Papers relating to the North American Boundary

Correspondence with C. Frodsham and Co. concerning clocks by Lindsay Russell on trial at the Royal Observatory, 1874.

(2) Papers relating to the North American Boundary west of Lake in the Woods

Correspondence with Captain L. Anderson, Royal Engineers, concerning the determination of the 49th Parallel and the methods to be used, with a map of the area, a memorandum of progress and the Astronomer Royal's reply.

Letter from the Admiralty enclosing confidential letters from Captain L. Anderson, 1874 (the letters were returned to the Admiralty), with a reply.

Letter from Captain L. Anderson acknowledging the Astronomer Royal's reply to his request for advice on methods, 1874.

Correspondence with the Admiralty and the Foreign Office concerning a letter from Major Cameron, R.A., relating to methods to be used for the determination of the North American Boundary, 1874.

Correspondence with Captain Anderson concerning the storing of Commission papers at the Royal Observatory and an acknowledgement from the Astronomer Royal of their receipt, 1874.

Correspondence with Captain Featherstonhaugh, Royal Engineers, concerning his 'narrative' to the North American Boundary Commission's work, 1876.

(3) Miscellaneous papers concerning geodesy

Printed letter, in French and German, concerning international observations, 1886, with blank report forms.

Correspondence with Fritz Arndt, Dresden, regarding the height above mean sea level of Greenwich and Sawbridgeworth, Herts, 1890.

Correspondence with H. Bathiuyze, Leiden, regarding the latitude of Greenwich, 1890.

Correspondence with Col. Hart regarding the length of the Earth's meridian, 1891.

Correspondence with W. Lane concerning the time kept in France, Spain and Italy, 1893.

Printed paper by Lt. General Chapman for the President of the Royal Geographic Society regarding the survey of Africa, 1895.

Enquiry from the Great Western Railway, Bristol, as to the time difference between London and Bristol, 1895.

Correspondence with C. Leeson-Prince concerning old papers found by him relating to the activities of French survey offices in England, 1895. The papers are included in an envelope.

Correspondence with the North Charterland Exploration Co. Ltd concerning astronomical observations for its expedition to Northern Kenya, 1895.

(4) Papers relating to books required by the North American Boundary Commission and deposited in the Royal Observatory

Correspondence with Captain L. Anderson asking for a sight of the references to the previous survey, 1874.

Memorandum from G.B. Airy asking for the book required to be located, 1874.

Correspondence with the Topographical Office of the Quartermaster General regarding missing volumes, 1874.

(5) Miscellaneous enquiries

Correspondence with various individuals on geodesy, 1875-1880, including J. Hampden on his philosophical effusion; John Burnett on quadrature of the globe; E.J. Routh on a mountain's attraction; D. Gill on geodetic operations in Egypt; Col. Clarke, Ordnance Survey, on his Hyper-hemispherical map; and W.R. Forster on what is the weight of the Earth in tons.