He is listed as M.C. & Columbus Hollingsworth in the ADAH database @ http://www.archives.state.al.us/civilwar/search.cfm
A history of his unit, the 63rd. Alabama, can be found at this site.
http://www.tarleton.edu/~kjones/alinf.html#63rd-Inf
His military and pensions records should contain the answers you seek. These can be ordered from this site.
http://history-sites.com/research/index.html