I checked the records already on the Oscar Hull profile. Looks like his place of birth is incorrect and he was actually born in Vermont, which is where his parents were married. His father died in or near Ingersoll, Ontario, so I/we should check the Ontario census records in 1851 and 1861.
Something odd: Effie isn't in the 1870 Michigan census, although in 1880 it says she was 14 and born in Canada. Will be interesting to see if she was in Ontario in 1870.