Born to Harold James and Dora Elena (Andreini) Webster in London, England.
Earns a Bachelor of Arts in Hispanic studies, with honors, from the University of Liverpool.
Achieves a Master of Arts in Spanish from the University of Nottingham.
Becomes certified in education by the University of Liverpool and moves to Canada.
Teaches as a professor at the University of Toronto until attaining emerita status in 1995.
Obtains a Doctor of Philosophy in Spanish from the University of Toronto.
Serves as an associate dean at the University of Toronto until 1981.
Is the director of the Center for Medieval Studies at the University of Toronto until 1994.
Serves as president of the American Academy of Research Historians of Medieval Spain until 1995.
Publishes “Els Menorets: The Franciscans in the Realms of Aragon From St. Francis to the Black Death, (1348).”
Serves as graduate chair of the Department of Spanish and Portuguese at the University of Toronto until 1994.
Publishes “Per Déu o per diners: Els mendicants i el clergat al País Valencià (Recerca i pensament) (Catalan Edition).”
Publishes “Carmel in Medieval Catalonia (Medieval Mediterranean: Peoples, Economies and Cultures, 400-1500).”
Contributes as a fellow of the Royal Society of Canada and correspondent of Secció Històrico-Arqueològica of the Institute d’Estudis Catalans.
Maintains membership with the American History Association and the American Catholic History Association.