They are still a mystery to me. Cora is born in MI and it sounds like she comes from a German family. I assume her parents immigrated from Germany as well. I show a few different years for Charles or Carl, depending on the year. I show one in 1868 when he was young or 1882 when he was 18. My mother in law tells me the Eismans moved there to work in a brewery. I just can't find much out about them.