The collection of James Charles Napoleon Humphreys, a Consulting Engineer and Director of Companies, contains company reports, notices to shareholders, articles in mining journals, press clippings, correspondence and photographs relating to the mining of gold, coal, metals, minerals and precious jewels in South Africa, Bechuanaland, Nyasaland, Rhodesia and East Africa.
Subject matter includes metallurgy, geology, mineralogy, mining law and legislation, labour and the recruiting of Black labour, mining history, personalities and Rand Pioneers and mining groups, covering the years 1926-1967.
This content list can be cross-referenced with an Alphabetical list of headings and an Alphabetical list of file names, as well as an Index to plans, which are available as hardcopy inventories at Historical Papers.