Captain Peter Simonson 5th Indiana Battery
Acting chief of artillery for the 1st Division (4th Army Corps), Simonson on June 16, 1864 was busy entrenching here a 4-gun battery of artillery when he was killed by a Confederate bullet. The Confederate was perhaps a sharpshooter armed with an English made rifle with scope known as a Whitworth. The Whitworth fired a sixsided bullet that could kill a target one-half mile away. However, the two armies were within a few hundred feet of each other at this point, so it is not unreasonable to believe he could have been killed by a common Confederate rifleman.
Plaque courtesy Lat34North.com.
Original page, with additional info, here.
Photo credit: Byron Hooks of Lat34North.com.