My line is also through William Christoper Calvert and Mary Buggs, through their daughter, Anne Jane Calvert, who married John Shaw (among others). John and Anne's daughter, Elizabeth Jane was my great grandmother. Her first husband, and my ggrandfather, was John Edwin MacLennan. But her second husband was Frederick Henry Wilkins -- brother of your Mary Gertrude Wilkins. There was a great migration from Ontario to Alberta in the early 20th century.

I have names and dates for many of the family (William & Mary Calvert's 7 children, and most of their children's children, etc.), but sadly no sources listed, since I inherited the information from my grandmother, now long decesased.