I believe Quintus C. Heidelberg was commanding Mills company upon his enlistment.

Martin L. Moody was Captain of Company C up till his resignation September 8, 1864. In his letter of resignation he recommended his 1st Lieutenant Quintus C. Heidelberg as his replacement. The 37th Commander, so endorsed. Heidelberg was appointed Major of the battalion to rank from April 26, 1865 [sic]

The two remaining 2nd Lieutenants on what roll is available were John West and J. D. Northrup

M269: Compiled Service Records of Confederate Soldiers Who Served in Organizations from the State of Mississippi