The Rebel, as anticipated, tries to gain the left of the Third Corps, and for this purpose is now moving into the woods at the west of Round Top. We knew what he would find there. No sooner had the enemy gotten a considerable force into the woods mentioned, in the attempted execution of his purpose, than the roar of the conflict was heard there also. The Fifth Corps and the First Division of the Second were there at the right time, and promptly engaged him; and there, too, the battle soon became general and obstinate. Now the roar of battle has become twice the volume that it was before, and its range extends over more than twice the space. The Third Corps has been pressed back considerably, and the wounded are streaming to the rear by hundreds, but still the battle there goes on, with no considerable abatement on our part. The field of actual conflict extends now from a point to the front of the left of the Second Corps, away down to the front of Round Top, and the fight rages with the greatest fury. The fire of artillery and infantry and the yells of the Rebels fill the air with a mixture of hideous sounds. When the First Division of the Second Corps first engaged the enemy, for a time it was pressed back somewhat, but under the able and judicious management of Gen. Caldwell, and the support of the Fifth Corps, it speedily ceased to retrograde, and stood its ground; and then there followed a time, after the Fifth Corps became well engaged, when from appearances we hoped the troops already engaged would be able to check entirely, or repulse the further assault of the enemy. But fresh bodies of the Rebels continued to advance out of the woods to the front of the position of the Third Corps, and to swell the numbers of the assailants of this already hard pressed command. The men there begin to show signs of exhaustion—their ammunition must be nearly expended—they have now been fighting more than an hour, and against greatly superior numbers. From the sound of the firing at the extreme left, and the place where the smoke rises above the tree tops there, we know that the Fifth Corps is still steady, and holding its own there; and as we see the Sixth Corps now marching and near at hand to that point, we have no fears for the left—we have more apparent reason to fear for ourselves.