AB, Whittier College, 1941. Master of Arts, Haverford College, 1947. Doctor of Humane Letters (honorary), Haverford College, 1986.
Doctor of Philosophy, University Pennsylvania, 1952. D. Pedagogy (honorary), Susquehanna University, 1974.
Faculty, Temple University, 1947-1962; associate professor of history, Temple University, 1959-1962; professor of history, curator Quaker Collection, Haverford (Pennsylvania) College, 1962-1990; librarian, Haverford (Pennsylvania) College, 1969-1986.
With American Friends service committee, 1943-1946, chairman international centers committee, 1961-1965, board directors, 1967-1973. Chairman American section Friends World Committee Consultation, 1968-1973. Chairman Friends World Committee Consultation, London, 1974-1980.
Member Pennsylvania History Association, Organisation American Historians, History Society Pennsylvania, Friends History Association (board directors, president 1970-1972, 74-77, 95-96), Friends History Society (England) (president 1970).
Married Marian Phillips Taylor, March 9, 1946. Children: Margaret G., Judith S. Sylvia T., Virginia H.