I'm looking for information about my gr-gr-grandmother. Her name is Mary and she was the wife of George Stech. On the 1870 census of Pittsburgh's 12th Ward, George and Mary are both listed as having been born in PA. George's line (6) reveals that both his parents are of foreign birth, but not Mary's. I'm hopeful that if I can find a marriage record for this couple and get Mary's maiden name, I may find my next set of ancestors. Can someone advise me about this? Thank you very much!