Bachelor, University Toronto, Canada, 1950. Diplome in French, University Rennes, France, 1951. Master of Arts, University Toronto, Canada, 1955.
Doctor of Philosophy, Emory University, Atlanta, 1961.
Acting assistant professor College Charleston, South Carolina, 1958—1959. Assistant professor Old Dominion University, Norfolk, Virginia, 1959—1979, professor emeritus of history, since 1984.
Member of Mediaeval Academy of America, American History Association.
Married Margaret Bell Smith, December 17, 1955. Children: Anne Katherine Mary Tyrell, Joseph Douglas George Tyrell, Diana J.B. Tyrell Suchla.