Bachelor of Arts, Clark University, 1931; A.M., Clark University, 1932; Doctor of Philosophy in American History, Clark University, 1953; Doctor of Humane Letters (honorary), Clark University, 1981; graduate, University of Pennsylvania Army Specialized Training Program, 1943-1944.
Assistant librarian, Massachusetts History Society, Boston, 1934-1947;
librarian, Massachusetts History Society, 1947-1962;
director, Massachusetts History Society, 1957-1976;
director emeritus, Massachusetts History Society, since 1977. Member Massachusetts Revolutionary War Bi-Centennial Commission, 1965-1991, Massachusetts Governor's Commision on Need of New Massachusetts Archives Building, 1974, Massachusetts Archives Advisory Committee, 1978-1991. Member administrative board Adams Family Papers, 1956-1991,George Washington Papers, 1969-1991, Daniel Webster Papers, 1966-1989.
Member visiting committee Boston College Library, 1964, 67-68, Harvard University History Department, 1962-1968, Harvard University Press, 1965-1971. Consultant New York State History Association, 1978, Virginia History Society, 1981.
Board of directors Freedom Trail, Boston, 1965-1991. Trustee Clark University, 1963-1974, honorary trustee, since 1974. Served with United States Army, 1942-1944.
United States Army Air Force, 1944-1945. Fellow American Association for the Advancement of Science. Member Archives American Art (advising committee New England branch 1972-1991), American Antiquarian Society, American Bostonain Society, Colonial Society Massachusetts (vice president 1980-1991), Massachusetts History Society, New England History Genealogical Society (correspondent secretary 1973-1981), Weston (Massachusetts) History Society (president 1977-1984), Odd Volumes (Boston, vice president 1979-1983), Grolier Club (New York City), Odd Volumes Club (vice president 1979-1983), Phi Beta Kappa.
Married Alice Amelia Riehle, July 2, 1949.