I am searching for some clarification on Robert S. Martin who married Elizabeth Zumwalt in 1862 in Boone County, MO. She had previously been married to William Thomas. In 1860. She died before 1870. In the 1860 census for Boone County, MO I found Robert S. Martin with Dulana and then children Eliza C, John M, Lucy A, and Samuel. In 1870 I found Robert S. Martin in Miller County, MO with spouse Susan, children Eliza C, Lucy A, Samuel J, and Robert J, Meredith M, and Mary J (these 3 were the children of Elizabeth), then William, Martha, and Nancy Brasier (which makes me think Susan had been married to a Brasier). In 1880 Robert S and Susan remain in Miller County, MO with Meredith and Dulcima age 7 in the household. After that I lose them. I also found a marriage record for Robert S. Martin to Sarah Hudson in 1847 in Callaway County. Did Robert S. have 4 wives? Can anyone help me sort this out?