Two other places to check for Heinrich would be Bucyrus, Crawford Co., OH and
Belleville, St. Clair Co., IL. Joseph's son Martin moved to Belleville as a young
man and there was at least one other family of Gaa's that moved there.
Two of Markus Gaa's children settled in Bucyrus. So there may have been family
already living there.
Keep in mind that all of the Hockenheim families coming to America were very
interconnected in Hockenheim.
I think Bob lives in Belleville, so he might have something to add the next time
he checks in.
BTW, I'm going to post some info about Joseph's brother Johann Markus to the
Gaa mail list.