Just a couple of quick questions.First, he enlisted in the Infantry.Was he a foot soldier during the war and a ship's caulker/carpenter afterwards?If so, could he have been in the Merchant Marine or the Coast Guard?
And, if he stated that he was born in Montreal, have you had any luck tracking him down at any of the parishes there?
Finally, it sounds like Mary Tobin might have been Irish.Does that jive?When the baby was born at sea, it's really curious.When was she born?Could she have a different father and Michael just lent his name in a marriage after the fact?
Otherwise, I think there's enough to do some poking around.Have you used the Loiselle Index or the Quebecois Archives at all?And have you had any luck finding Induction records for the Civil War?
Let me know.I should be down at NARA at the end of the week and the Newberry by next weekend.Will let you know if I can find anything.