...e retreat was effected without difficulty and without pursuit. The trains and artillery were saved, and the two wings of Lee's army were united at Sharpsburg. There had been much straggling of Longstreet 's men on that hot and dusty march from Hagerstown. Garnett estimates that in marching and countermarching, his brigade passed over twenty-two or twenty-three miles. The reports are very meagre as t...