Very belated thanks, George. (See my separate response to "Johnny Reb.") I feel fairly confident that this is the "Sgt. Dunning" who deserted (or should I say, "deserted"?) from the CS sig and observation sta on "Signal Knob" and "dumped core" in his interrogation by Union authorities, as carried in the OR. I am uncertain whether he was a "signal sergeant" or his infantry rank accepted in transfer.