I am interested in William and his wife Mary Grierson my great aunt on my grandfathers side, Robert Grierson, who I am named after.

I remember meeting her when I was very young with my grandmother Anne Grierson in Cumnock Ayrshire. I am researching my family tree and have came to a stop with Mary. In the attached pic Mary is at the far right. My grandfather is in the middle at the back.
Regards
Bobby Grierson