Hi, I'm sorry I do not know much about Mary Wallance, but my aunt might. Are you looking for something specific?
I am a desendant of Batholomew diggins (he is my GG Grandfather). One of their sons, LOUIS BARTHOLOMEW DIGGINS, is my Great Grandfather. Louis's son, James Loius Diggins, my grandfather, and his son, Robert Diggins, is my dad. My Dad's sister, Meg Diggins, might have some info for you.