I am searching for information on Franz Heppe probably from north of Koln in Germany who married Franziska Mollerus from Lippstadt in Germany. Franz was born January 3, 1820 and Franziska was born February 16, 1823. Trying to determine their marriage date, where and their parent's names and where they are from. I research in the Mormon Library in Salt Lake City, but not knowing this information, I am getting nowhere in getting any further back in this line. They are both my Great-Great-grandparents. They are the parents of Mary Heppe born February 10, 1847. She married my great-grandfather, John Theodore Held of Hartford, Wisconsin. I would appreciate any information you can supply. Thank you.