From 1968 to 1973 Benson worked as a mining consultant for the Ministry of Lands and Mineral Resources in Ghana, from May 1970 under the Special Commonwealth African Assistance Plan as a Technical Assistance Officer. In June 1971, he was responsible for the reorganisation of the Diamond Digger Scheme. Benson’s letters describe inspecting mines, settling disputes over concessions, the running of mining camps, labour relations, illegal mining, diggers’ licenses, the general conduct of the gold and diamond mining industries as well as his travel, friends, colleagues and social activities (circa 250 sheets).