His full name was Murdock (sometimes with an "H") John McSween.

Do you have any documentation for these statements you sent me?

"He originally volunteered at Bennettesville, S. C. by Captain Harrington for a period of 12 months. I have not been able to locate this Captain. Assume it was some militia unit."

"....first volunteered December 26,1860 at Bennettesville, S. C.,"

Thanks.