Thanks Bryan,that helps a lot, my prime subject is, as you may recall, Oliver Crosby GRAY (1832ME-1905AR).
Have you anything on Co A, 3rd Ark through to August 19, 1864 when captain GRAY was discharged to join the Confederate Navy. per his letter request to Gen Cooper, of July 17, 1864 from Sandtown, GA, and then Dedman (1831-1899AR) was promoted company commander?