List of sources:
Albany Natural History Society. Minute Book, 1867-1875, meetings of 25 July and 1 August 1867.
Cape Monthly Magazine, 2nd series, 1872, Vol. 4, pp. 382-384, "Albany Natural History Society".
Cape of Good Hope. Catalogue of the natural history collections of the Albany Museum, Grahamstown (Appendix to Parliamentary Report G24-'83). Cape Town: W.A. Richards & Sons, 1883.
Cape of Good Hope. Report of the Committee of the Albany Museum, 1865, 1876.
Cape of Good Hope. Report of the trustees of the South African Museum, 1855.
FamilySearch: Edward Bruce. https://ancestors.familysearch.org/en/K8LR-N6H/edward-bruce-1807-1876
FamilySearch: Rachel Ralph. https://www.familysearch.org/ark:/61903/1:1:CG83-GCPZ
Grahamstown Journal, 24 May 1856, p. 3: "Literary, Scientific and Medical Society"; 17 January 1868, p. 2; 20 March 1868, p. 3; 9 October 1868, p. 3; 20 November 1868, p. 3: "Albany Natural History Society".
National Automated Archival Information Retrieval System (NAAIRS). http://www.national.archives.gov.za/naairs.htm Documents relating to Edward Bruce.