Upon arriving at Gettysburg the battery was ordered to report to Major Latimer, who assigned it a position a short distance to the left of the Cashtown pike. In the terrible battle that ensued, the Baltimore Light Artillery played its part, and when the retreat commenced it was kept in the rear to assist in covering the passage of the army and wagon trains through the mountain passes. At a point near Mount Zion the enemy had so stationed his guns as to completely command the road through the gap over which a column of infantry must pass. There was but little time to spare, for the enemy were pressing them hard. Captain Griffin was ordered to place his guns in position, and if possible silence the battery. It seemed a desperate undertaking, but there was no alternative. Quickly the brave fellows ran their guns to within point blank range, and opened a deadly fire. It was promptly returned, and a heavy artillery duel continued for some time, when the enemy’s battery was driven from its position, and the infantry and wagon train passed in safety. I have heard it asserted by old soldiers that this was one of the most desperate artillery fights they ever witnessed. And the Marylanders had every reason to be proud of their victory, for it was their old antagonist, battery M, of the regular artillery, that they had again measured strength with. At Hagerstown the battery participated in a severe cavalry fight, in which the Confederates were entirely successful. After the army of General Lee recrossed the Potomac, the battery was ordered to Fredericksburg, where it remained for a few days, and then rejoined the main army at Culpepper Court House, and was assigned to the battalion commanded by Major Beckham. For two weeks everything remained quiet, and well it was, for human endurance had been taxed to the utmost limit in the severe campaign of the summer, and required rest and repose.