Correspondence and other papers on the Topographic Survey of South Africa and the Arc of the Meridian, divided into four sections:
'Topographical Survey of British South Africa': correspondence and reports, 1902-1905, relating to D. Gill's proposal and plans for the topographical survey, including the 'Proceedings of Congress' held at Cape Town, March 1904, and Minutes of the Inter-Colonial Council Select Committee on Surveys, 7 June 1905.
'Miscellaneous': letters to D. Gill regarding problems he encountered with regard to the financing and organisation of the topographical survey, 1905-1906.
'Arc of Meridian': correspondence concerning the Arc of Meridian work, 1900-1906, including a report on Lacaille's work and how it is to be followed up, and further correspondence on the geodetic survey.
'Arc of Meridian. Miscellaneous', 1900-1906.