List of sources:
Campbell's Grahamstown Annual, 1871, pp. 60-62: Clergy list.
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, 1870, 1898.
Cape of Good Hope. Report of the trustees of the South African Museum, 1898, 1899.
General directory of South Africa, 1903, 1908, 1909, 1910, 1911.
Mendelssohn, S. South African bibliography. London, 1910.
National Automated Archival Information Retrieval System (NAAIRS). http://www.national.archives.gov.za/naairs.htm Documents relating to Green, T.W.