Second Brigade
Third Division - First Corps
Army of the Potomac
First Corps Third Division
Second Brigade
Col. Roy Stone, Col. Langhorne Wister
Col. Edmund L. Dana
143d. 149th. 150th. Pennsylvania Infantry
July 1 Arrived and went into position at the McPherson building between Reynolds's Woods and the Railroad Cut and was subjected to a heavy front and enfilading artillery fire from the right. Repulsed repeated attacks of Brig. Gen. Daniel's Brigade Major Gen. Rodes's Division from the right as well as front attacks until pressed on both flanks and in front by superior numbers it retired to Seminary Ridge and held temporary breast works there until the Corps retired before overwhelming numbers to Cemetery Hill when the Brigade with the Division took position at the left of the Cemetery on and near the Taneytown Road.
July 2 Late in the afternoon moved to left and took position previously occupied by First Division Second Corps.
July 3 Remained in the same position under the heavy artillery fire in the afternoon.
The strength of the Brigade July 1st 1315.
Casualties. Killed 4 officers 105 men. Wounded 35 officers 430 men. Captured or missing 8 officers 271 men. Total 853.
Marker is at the intersection of Stone Avenue and Chambersburg Pike (U.S. 30), on the left when traveling south on Stone Avenue.
Courtesy hmdb.org