[1] His parents, originally from the United Kingdom, were Blanch Louise Reid[2] and Archibald Hamilton Ritchie,[3] a University of Glasgow alumnus.

[6] He served at the plastic and jaw injuries unit at East Grinstead, Sussex, and became a consultant specialist in dental surgery to the Ministry of Health.

[5] Following the end of the war, Hamilton Ritchie remained in Britain for several years, before emigrating to Southern Rhodesia in 1950, where he commenced general and consultant practice.

He ran for re-election again in 1974, defeating Rhodesia Party candidate Peter Bridger and the independent Wendy Ann Truen with 66% of vote.

He ran for re-election for the last time in 1977, defeating with 74% of the vote challengers Lance Halford Reynolds of the National Unifying Force, Robert Sutton of the Rhodesian Action Party, and the independent Wendy Ann Truen.