According to the book "The Chamness Family In America" written in 1922. Perhaps you already know most of this.
" 6d. Seth M., b 11-14-1837, d 3-4-1888 - the youngest of the family of William and Anna, married Rachael Beeson, 8-15-1864. Seth lived in Richmond for many years. His wife Rachael died there, leaving a daughter, Lena M., who married Erastus Burroughs, and lives on a farm south of Losantville in Wayne County. Their children are Iva B., Raymond, Robert, Edna and Richard. Seth M. married a second wife in the person of Anna Forbes. They moved to Losantville where he had a hardware store for a number of years. Disease took hold of him; he kept at the business for a while. Disease kept on until he was obliged to take his bed. He died at an age when he should have been little beyond the prime of life. He and Anna had a son, Herbert H., their only child. He married Fanny Burroughs, widow of Alonzo Buttoughs, born 7-30-1870; d 11-19-1913. He was a very proficient telegrapher, and had worked for years at the tower at the crossing of the two roads at Losantville. He died of some acute disease not well known."