From the monument:
Battery H First U. S. Artillery
Six 12 Pounders
Lieut. Chandler R. Eakin Commanding
July 2. In position on Cemetery Hill facing the Emmitsburg Road. Engaged July 2nd and 3rd. Lieut. Eakin severely wounded after his guns went into battery and the command devolved on Lieut. Philip D. Mason.
Casualties Killed 1 Man Wounded 1 Officer and 7 Men Missing 1 Man