Couch's Division, Fourth Army Corps,
Maj. Gen. D.N. Couch, Commanding.
September 16-18, 1862.
On the 16th, Couch's Division was drawn up across Pleasant Valley near Rohrersville, observing McLaws' command. On the morning of the 17th, the Division marched nearly to Harper's Ferry, then countermarched and bivouacked that night on the Huffer Farm about a half mile south of Keedysville.
It reached the field about 11 a.m., on the 18th, Cochrane's Brigade relieved Irwin's Brigade of Smith's Division, Sixth Corps, behind the ridge east of the Hagerstown Pike and the Brigades of Devens and Howe formed in rear of Brook's Brigade of Smith's Division, Sixth Corps, and French's Division, Second Corps.
The Division was not engaged in the action.