GNMP. Black & White photograph of Calif's (Calef) Battery A, 2nd U.S. Artillery, McPherson's Ridge. The view is located along modern day route 30 (Chambersburg pike) near McPherson's barn.. Lt. John H. Calef commanding, BG John Buford's 1st Cavalry Division, Cavalry Corps, AOP. Visible in the view is a pair of 3" Ordnance Rifles, Ammunition stacks, Battery tablet, and War Dept. fencing.The feint outline of the Katalaysian Springs Hotel can be seen rising beyond the treeline in the right background.The ground just over the fence in front of the guns would later become Stone avenue. Please also note the Battery had a 2-gun section placed on East McPherson's ridge along modern-day South Reynolds Avenue.