Mary George, who writes as Elizabeth Thornton, was born in Aberdeen, Scotland. She was an elementary school teacher before establishing the St. Swithin Street Nursery School in 1967.
In 1969, she and her family, her husband and their three sons, moved to Winnipeg, Canada, where she continued her teaching career. In 1977, she was appointed as a Pastoral Assistant of a Presbyterian Church in Winnipeg. In 1985, she completed an honors degree in Classical Greek winning the Gold Medal in Classics. Her honor's thesis was entitled "Women in Euripides."
In 1987, she became a full time writer.
Mary George died on July 12th, 2010 in Winnipeg, Canada.