In the 1850 US Federal Census for Nineveh, Johnson County, Indiana, Polly (Mary) has married Reuben Nay after the death of her first husband, Samuel Sellers. This appears to be a blended family of "mine, yours and ours." Living with Reuben and Mary are Reuben's children, Joseph L (age 17 and a farm laborer), and Frances Jane (age 16), Mary's children Elizabeth (age 12), Sarah Ann (age 8), and Louisa C (Caroline Louisa, age 7) and their children, Margaret (age 4) and Roland T (age 5 months). All the children are listed with the last name of Nay, so this is my best guess at assigning them to the correct parents. In the 1860 census, both Elizabeth and Louisa (Carrie) are listed as Sellers so I know their parentage is correct.