List of sources:
Clancey, P.A. The birds of Natal and Zululand (pp. xxiii-xxvi). Edinburgh: Oliver & Boyd, 1964.
Clancey, P.A. A one-time Mecca for ornithologists. Natalia, 1975, Vol. 5, pp. 29-35.
FamilySearch: Henry Gordge. https://www.familysearch.org/ark:/61903/3:1:3QHV-J3DQ-KKSX?view=index&personArk=/ark:/61903/1:1:6NJM-J9TT&action=view and https://www.familysearch.org/ark:/61903/1:1:QLRL-3Y47
Natal Government Gazette, 7 September 1880, pp. 644-661: List of voters for members of the Legislative Council for...Durban.
National Automated Archival Information Retrieval System (NAAIRS). http://www.national.archives.gov.za/naairs.htm Documents relating to Gordge, Henry / Mr Gordge.