Her first name was Tomma and she was married to Gerhard Mueller until he died in the 1870s in Quincy, Illinois. She was a milliner after his death and is listed in numerous business dealings. Sometimes she was incorrectly listed as “Mrs. Thomas Mueller.” There was no Thomas Mueller–at least not in this situation. Any attempt to find the Mr. Thomas Mueller will only serve to confuse my research even more.
Is it possible that the person you think existed as a separate individual was actually a just a mistake?