He married the future sculptor Anne Seymour Conway, daughter of Field Marshal Rt. Hon. Henry Seymour Conway and Lady Caroline Campbell, on 14 June 1767. She separated from him seven years later.
Damer got heavily into debt and his father refused to help him financially. He shot himself on 15 August 1776 at the Bedford Arms, Covent Garden.[4][5]
^Alison Yarrington, "Damer, Anne Seymour (1749–1828)", Oxford Dictionary of National Biography, Oxford University Press, 2004; online edn, January 2008 Subscription site