List of sources:
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FamilySearch: John Dampier Green. https://www.familysearch.org/ark:/61903/3:1:3Q9M-CS7P-F3SS-L?view=index&personArk=/ark:/61903/1:1:QLR2-8TPY&action=view
Geological Society of South Africa. Proceedings, 1915, Vol. 18, p. xiii, past secretaries; Transactions, 1895-1899, 1906, Vol. 1, 2, 4, 10.
Hall, A.L. A bibliography of South African geology to the end of 1920. Pretoria: Geological Survey, Memoir No. 18, 1922.
South African Association for the Advancement of Science. Report, 1903, 1905/6: Lists of members.
Wills, W.H. The Anglo-African whos who and biographical
sketch book. London: Upcott, 1910.