I would imagine Union Brig. Gen. E. M. McCook or his adjutant had to send in a report of the surrender in Albany. You might check out any reports in the volume of books, in a lot of libraries called something like "Official Records of the War of the Rebellion" or something similar to that.

I do have one of Pruden's battery's rosters here but there isn't much information on it. It does show that Private J. M. Dugger was "absent sick" on July 22, 1864.