Statistics for occurrence #1 of “Lieutenant A. C. M. Pennington” in chapter 4.57 of Robert Underwood Johnson, Clarence Clough Buell, Battles and Leaders of the Civil War. Volume 3.:

...New Jersey soon adjusted their line to correspond with that of their antagonists, and firing began. At the same time a Confederate battery appeared on the top of the ridge and commenced shelling. Lieutenant A. C. M. Pennington 's battery (M, 2d U. S. Artillery), in position in front of Spangler's house on the Hanover road, instantly replied. The 3d Pennsylvania was ordered forward, and two squadrons under Captains Treiche...
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