List of sources:
Anglo-African who's who and biographical sketch book. London: Upcott, 1910.
Burrows, E.H. A history of medicine in South Africa. Cape Town: Balkema, 1958.
Cape of Good Hope Government Gazette, 9 January 1885, pp. 41-45: List of medical practitioners in the Cape Colony.
Cohen, A.B. Notes on southern African stone tool collectors represented in the collections of the British Museum (Nat. Hist.) Unpublished manuscript, 2001.
Dictionary of South African biography, Vol. 5, 1987.
Encyclopaedia Britannica, 10th ed., 1902-1903.
FamilySearch: Alfred Peter Hillier. https://www.familysearch.org/tree/person/details/LB4F-F78
Goodwin, A.J.H. A commentary upon South African prehistory up to the introduction of the new terminology. Bantu Studies, 1935, Vol. 9, pp. 291-333; bibliography pp. 387-413.
Grahamstown Journal, 23 November 1886, p. 3; 25 November 1886, p. 3: Eastern Province Literary and Scientific Society.
Hall, A.L. A bibliography of South African geology to the end of 1920. Pretoria: Geological Survey, Memoir No. 18, 1922.
Medical and pharmacy register for the Colony of the Cape of Good Hope, 1893, 1907.
Mendelssohn, S. South African bibliography. London, 1910.
Mitchell, P. The South African stone age in the collections of the British Museum: content, history and significance. South African Archaeological Bulletin, 1998, Vol. 53, pp. 26-36.
National Automated Archival Information Retrieval System (NAAIRS). http://www.national.archives.gov.za/naairs.htm Documents relating to Alfred Peter Hillier / Alfred P. Hillier.
National Union Catalogue, pre-1956 imprints. London: Mansell, 1968-1980.
Obituary: Alfred Peter Hillier. The British Medical Journal, 4 November
1911, p. 1236.
South African bibliography to the year 1925. London: Mansell, 1979.
South African medical directory for 1897. Cape Town: Cape Times, 1897.
South African Medical Journal, Series 1, 1886, Vol. 2; Series 2, 1895, Vol. 2, pp. 329-331: Transvaal Medical Society.
Staatsalmanak der Zuid-Afrikaansche Republiek, 1898, pp. 86-93: Naamlijst van de geadmitteerde genees-, heel- en verloskundigen.
University of the Cape of Good Hope. Calendar, 1878.
Who was who, Vol. 1, 5th ed. London: Adam & Black, 1967.