I did find a couple of Records for officers who were elected in the Yell Rifles, just before the Arsenal Crisis.

BLACKBURN, JAMES Lt – Elected 22 Jan 1861 as Lt "Helena Yell Riflemen" 12th AR Militia, in Edward G. Gerdes Civil War Page, ARKANSAS SOLDIERS IN VARIOUS MISCELLANEOUS UNITS, Roll 225, Accessed 27 January 2011, http://www.couchgenweb.com/civilwar/misc255.html

I wounder if Cleburne's individual records have any record of his enlistment or election in the Yell Rifles?