Confederate ranger whose guerrilla band specialized in attacking and disrupting Union supply lines. Mosby’s nickname, The Gray Ghost, was derived from his clandestine attack tactics. Rare fountain pen signature, “Very respectfully, J.W. Mosby” on an off-white, lightly lined 4.25 x 1.25 slip, clipped from the closing of a letter. In fine condition, with a vertical crease through first letter of last name. R&R COA.