The marker for Seymour’s Brigade of Meade’s Division is on the west side of Smoketown Road at the north edge of the East Woods. (Smoketown Road North tour map)

From the marker:

U.S.A.
First Army Corps

Seymour’s Brigade, Meade’s Division 

Brig. Gen. Truman Seymour, Commanding.

Organization.
1st Penn. Reserve Infantry
2nd Penn. Reserve Infantry
5th Penn. Reserve Infantry
6th Penn. Reserve Infantry
13th Penn. Reserve Infantry

September 17, 1862.

Seymour’s Brigade became engaged at daybreak, and advanced on either side of this road into the East Woods, where it became heavily engaged with the enemy.

At the western edge of the East Woods its advance was checked by the enemy, and its ammunition having been exhausted, it was relieved about 7 A. M. by Ricketts’ Division, and withdrawn to the ridge in the rear of Joseph Poffenberger’s.

No. 17.