I've added a possible 1860 census and a possible marriage record to his profile, under sources. The marriage record has the correct date, but not the correct name of Mary Jane Williams. It's possible she was married before although if the 1860 census is correct, she was really young. Both of these records are for Putnam County, that you have as the marriage place. Who knew there were so many people named Levi Jackson Lewis? The 1860 census no longer has a link on family search, so I've included the image link.
Do be careful about the FamilySearch profile attached to the marriage record as it has Levi born in 1840, which would make him too young to be married in Indiana in 1856 without guardians/parents giving permission.