You can authenticate from the Supplement to the Official Record volumes.
Company A, muster-in roll Aug. 17, 1861, Camp near Mount Vernon, Missouri
Company B, Aug. 17, 1861, Camp near Mount Vernon, Missouri
Company C, -do-
Company D, -do-
Company E, -do-
Company F, -do-
Company G, -do-
Company H, -do-
Company I, October 26, 1861 at Fort Smith, Ark.
Company K, October 29, 1861 at Fort Smith, Ark.
M317: Compiled Service Records of Confederate Soldiers Who Served in Organizations from the State of Arkansas