Towards night we heard the first musketry firing. It proved to be the closing of the short but sanguinary battle of South Mountain. General Reno, commanding the Ninth Corps, whose glistening bayonets we had seen across the valley ahead of us, had overtaken the rebel rear guard in South Mountain pass and a severe action had ensued. General Reno himself was killed. His body was brought back next morning in an ambulance on its way to Washington. We reached the battle-ground about midnight, whither we had been hurried as supports. The batteries on both sides were still at work, but musketry firing had ceased. It had been a beautiful though very warm day, and the night was brilliantly moonlight, one of those exceptionally bright nights which almost equalled daylight. And this had been Sunday--the Lord's day! How dreadful the work for the Lord's day! Here I saw the first dead soldier. Two of our artillerymen had been killed while serving their gun. Both were terribly mangled. They had been laid aside, while others stepped into their places. There they still lay, horrible evidence of the "hell of war." Subsequently I saw thousands of the killed on both sides, which made scarcely more impression on me than so many logs, but this first vision of the awful work of war still remains. Even at this writing, forty years later, memory reproduces that horrible scene as clearly as on that beautiful Sabbath evening. It was past midnight when we bivouacked for the little rest we were to have before resuming the "chase." Being now in the immediate "presence of the enemy," we rested on "our arms," that is, every soldier lay down with his gun at his side, and knapsack and accoutrements ready to be "slung" immediately on the sounding of the "call." We officers did not unsaddle our horses, but dismounted and snatched an hour's sleep just as we were. Bright and early next morning we were on our way again. It was a most beautiful morning. We soon passed the field where the musketry did its work the night before, and there were more than a hundred dead rebels scattered over the field, as the result of it. Two or three were sitting upright, or nearly so, against stumps. They had evidently been mortally wounded, and died while waiting for help. All were dressed in coarse butternut-colored stuffs, very ugly in appearance, but admirably well calculated to conceal them from our troops. We rapidly passed over the mountain (South Mountain) and down into the village of Boonsborough. There was abundant evidence of the rebel skedaddle down the mountain ahead of our troops in the way of blankets, knapsacks, and other impedimenta, evidently dropped or thrown away in the flight. We passed several squads of rebel prisoners who had been captured by our cavalry and were being marched to the rear under guard. They were good-looking boys, apparently scarcely more than boys, and were poorly dressed and poorly supplied.