List of sources:
Addresses and papers read at the joint meeting of the British and South African Associations for the Advancement of Science held in South Africa, 1905 (Vol. 2). Johannesburg: SAAAS, 1906.
British Association for the Advancement of Science. Report of the seventy-fifth meeting... South Africa, 1905.
Geological Society of South Africa. Transactions, 1906, Vol. 10: List of members.
Hall, A.V. A bibliography of South African geology to the end of 1920. Pretoria: Geological Society of South Africa, Memoir No. 18, 1922.