Having traveled 139 miles to get to Camp Crump might give you a clue if you know his home.
A. R. Bowen, age 30, 2nd Corporal, Capt. W. G. W. Jowers' Company, Crump's Battalion Mounted Volunteers,* enlisted November 4, 1861 at Camp Crump by W. G. W. Jowers for 12 months, value of horse $110, equipments, $25, traveled 139 miles to rendezvous, relived as 2nd Corporal May 8, 1862, reduced to ranks, recorded on the Sept. & Oct., 1862 and December 31, 1862 muster rolls as absent, in hospital, Knoxville, Tenn, no further records
Note: He must have been dropped from the rolls as his name is not recorded on subsequent muster rolls. This could have been for disability, discharge, death, capture, desertion, transfer, etc.
* This company subsequently became Company F, 32nd Regiment Texas Cavalry [15th Texas Cavalry, Crump's Battalion Mounted Vols.]
M323: Compiled Service Records of Confederate Soldiers Who Served in Organizations from the State of Texas
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See also:
http://www.tshaonline.org/handbook/online/articles/qkt32
http://www.researchonline.net/txcw/unit129.htm
http://www.texansinthecivilwar.com/biographies/benjamin_king.html
Camp Crump (located in Marion County, Texas)
http://jamesewilliams.tripod.com/texasconfederate.html
http://www.texansinthecivilwar.com/15th_Cavalry/15th_cavalry.html