Bachelor of Arts, University Toronto, 1939; A.M., Harvard, 1940; Doctor of Philosophy, Harvard, 1948.
Lecturer history, U. Toronto, 1946-1949; faculty, Johns Hopkins, Baltimore, since 1949; professor of history, Johns Hopkins, 1962-1989; professor emeritus, Johns Hopkins, since 1989. Visiting professor U. Leicester, England, 1968-1969.
(Hardback, ex-library, with usual stamps and markings, in ...)
(Landed elites from Britain, Prussia, Russia, Spain, and F...)
Conservation chairman Maryland Audubon Society, 1964-1969. Member international advisory board International Network for Religion and Animals, since 1985. Served with Canada Army, 1942-1944.
Served with Canada Navy, 1944-1946. Fellow Royal History Society. Member American History Association, Economic History Association, Phi Beta Kappa.
Married Eileen Jeffries, June 14, 1948.