Not much time was given for thought or talk before our brigade was ordered to "fall in," and we were moved out down to the left, and past Lee & Gordon's mills, to the relief of our hard-pressed cavalry, now falling back onto our main army. How urgent the need of assistance to our cavalry we soon learned as we saw them coming in wounded and broken, riderless horses, ambulances filled with wounded and dying--all coming together told how fierce the onslaught that had been made on them, and they who were yet unwounded were contesting, with all the bravery and stubbornness that men could, every part of the distance that lay between us and the enemy. Our lines were formed, and we moved forward, checking the enemy's advance for the day. Our skirmish line and pickets were strengthened, and our brigade remained on duty through the night, and listened to the ominous sounds that came to us through the darkness, the distant rumbling of artillery wheels, the sound now and then of axes, all telling us of the preparations that were being made, and the perfecting of plans for the terrible contest of the morrow. In the early morning of the 19th we were relieved from duty, and were sent back toward Lee & Gordon's mills, into an open field, there to prepare our breakfasts and get such sleep and rest as we could, until such time as our services would be demanded. The sun had scarcely appeared when a shot was heard over on the right of our line; in a short time another, as if one army or the other were feeling its way. Soon another shot, which brought an answering shot; then came the opening artillery duel that seemed to shake the very earth. From this, shots came from all along our lines, showing that the enemy had got well into position along our entire front during the night. Now the firing increases on our right, and between the artillery shots we catch the sound of musketry; stronger and stronger the contest grows, and nearer, too, for now comes one continuous roar of artillery from the right, and volley after volley of musketry tells that the two armies have come together in the first charges of the battle. The contest gathers in strength, starting down from the right, on it comes to the lines in our front, and on past us toward the left, until at length it becomes one commingled roar of artillery and rattle of musketry from right to left. We see none of the lines engaged, but it must be that the Union army is holding its position against the furious charges that are being made upon it. A lull for a few moments comes in the contest, and you hear only scattering shots along the line; but looking off to our front, through an opening in the trees, could be seen, crossing the ridge, the marching columns of the enemy as they moved toward our left, preparatory to the terrible work of that Saturday afternoon. Again the sound of the contest begins to gather and grow in strength. It comes on like the blasts