CDV of 56th Massachusetts Co. G Sergeant

CDV of 56th Massachusetts Co. G Sergeant taken by Smith in Southbridge, Massachusetts. I tried hard to nail down a ID for this image but could not narrow it down to which Sgt of the 56th Mass Co. G this is, with a little more time I believe someone could nail down who this soldier is.
 
56th Mass Service History: Campaign from the Rapidan to the James May 3-June 15, 1864. Battles of the Wilderness May 5-7; Spottsylvania May 8-12; Ny River May 10; Spottsylvania Court House May 12-21. Assault on the Salient May 12. North Anna River May 23-26. On line of the Pamunkey May 26-28. Totopotomoy May 28-31. Cold Harbor June 1-12. Bethesda ChurchJune 1-3. Before Petersburg June 16-18. Siege of Petersburg June 16, 1864, to April 2, 1865. Mine Explosion, Petersburg, July 30, 1864. Weldon Railroad August 18-21. Peebles' Farm or Peeble's Farm September 29-October 2. Boydton Plank Road, Hatcher's Run, October 27-28. At Fort Hays January 1 to April 1, 1865. Fort Stedman, March 25. Appomattox Campaign March 28-April 9. Assault on and fall of Petersburg April 2. Occupation of Petersburg April 3. Pursuit of Lee April 3-9. March to Petersburg and City Point April 18-22, thence moved to Alexandria April 23-25. Grand Review May 23. Duty at Washington and Alexandria till July -. Mustered out July 12, 1865.
 
Regiment lost during service 6 Officers and 120 Enlisted men killed and mortally wounded and 100 Enlisted men by disease. Total 226.