In the Saddle by Oliver Optic

As soon as Dr. Farnwright reached the prostrate form of Lieutenant Gilder, he shook his head as he glanced at the major; for the advance of the platoon had left them in the rear. He examined his patient, who had passed beyond human aid. The ball had struck him in the chest, and had doubtless penetrated his heart. His body was borne to the rear. Major Lyon was sad; but the loss of the noble young man did not affect him as it did the sergeant, for there was nothing revengeful in his nature.

Knox was disposed to annihilate the rabble in front, of him; but he was an obedient soldier, though he had ordered the discharge of pistols without orders; for the firing of the ruffians, and especially the fall of the gallant lieutenant, seemed to render any commands unnecessary. The major directed him to move his platoon forward, and he kept on the flank himself as he did so.