Great Britain, Directorate of Overseas Surveys. and Great Britain, High Commission Territories of Basutoland, the Bechuanaland Protectorate, and Swaziland. drawn and photographed by the D.O.S. from material supplied by the High Commissioner for Basutoland, the Bechuanaland Protectorate, and Swaziland. ... Directorate of Overseas Surveys and Edward Stanford Ltd. [distributor].