Thursday (21st), marched to near Snickers Ford. Camped near Colonel Ware’s. Fifteen miles. The next day, marched to Winchester. A fine town before the war. Eleven and one-half miles. Saturday (23d), enemy reported in force approaching Winchester. Skirmished all day. Small force of Rebel cavalry fool ours. Seven miles. Sunday (24th), defeated badly at Winchester near Kernstown by Early with a superior force. My brigade suffered severely. Rebels came in on my left. Poor cavalry allowed the general to be surprised. Seven miles. All [that] night marching, twenty-two miles, to Martinsburg. My brigade covered the retreat. Retreated from Martinsburg; turned on Rebels and drove them out. Monday night to Potomac at Williamsport, [Maryland], twelve miles, a severe, sleepy job. Camped on Antietam near battle-ground.