I´ve
found a handwritten identification. The window climber is not included. With a bit of further research the persons, left to right, are:
1st Lt. Henry H. Bingham (ADC) [MOH]
Lt. Charles Ricketts (ADC)
1st Lt. Warren (ADC)
Lt. Col. Frederick T. Locke (AAG)
Gen. Warren
Lt. Col. Henry C. Bankhead (AIG)
Cpt.
Not Sure (AAG)
Cpt. William T. Gentry (Mustering Officer, 17th U.S. Inf.)
Surg. John J. Milhau (Medical Director)
Maj. D.L. Smith (Commissary)
Cpt. William F. Drum (Ambulance Officer, 2nd U.S. Inf.)
1st Lt. Clark (Signals Officer)
Lt. William H. Wheeler (Escort, 1st Michigan Cav.)
There is one I couldn´t identify because the handwriting is difficult for me and didn´t find any mentions in reports or correspondence. For several I don´t have first names. If anybody can definitely read and/or verify those, you can zoom in pretty well in the link, I´d appreciate it.