My husband is related to this man. Their common ancestor is Thomas Southworth (1808-1862). I have posted to this forum, looking for information about Thomas, to no avail. He may have been born in New York; he married Hannah Buzan in Missouri in 1840, and died in Leavenworth KS in 1862. Their four sons were Sylvester, John, Thomas and Samuel, all born in the 1840s in Missouri.