This image was taken between 9/1862 and 9/1863 as Lt. Robert Crossman was serving in the 3rd MA infantry. You can see the brass numeral
3 on the front of his hat. His unit saw extensive combat in Virginia with him being wounded on 6/3/1864 at Cold Harbor. #4809-$125.00
The I.D. comes from CivilWarData.com.