...nt, having debouched from the woods on the banks of the Antietam, which had partially concealed them; at the same time heavy bodies were observed moving to attack our troops on the right, composed of Drayton 's and a portion of Kemper's brigade. I moved my command some distance to the front in the standing corn, (as many of my guns were short range,) in order that they could produce more effect, and ope...