The appointment of Captain Crow to major took place March 10, 1864, to rank September 11, 1863. Lt. William J. Cannon's promotion to captain of Company "D" should correspond to these dates. Cannon also served as AAQM from April to June 1862, and AACS from December 1862 to February 1863. I have this type of information for all field, staff and company captains if it would be useful.