I am also researching this family:
My father in law was John Edmund Tobin of San Francisco. His father was Edmund Tobin. His father was Patrick Tobin and grandmother was Margaret Tobin ( a Tobin married an unrelated Tobin!). Her father was Peter Tobin (m. Mary Md Donald of Glengarry), and Peter's father was Martin (Irish), son of Moses Tobin (m. Mary Lyster.
I would be very excited to trade genealogy with you....We have a relative living in Ontario that could also help out w/photos...i have a copy of a photo of Peter...
you can email me directly at firstname.lastname@example.org