While this fierce battle was raging on the left of the "Crater," other parts of the line to the right were hotly engaged, but the Confederates succeeded in repulsing every effort. About 2 p. m., heavy masses of troops were concentrated by the Federals directly opposite the position which McGowan's brigade had left the day previous. It took place while a seeming lull had occurred in the battle. I saw them when they first came in sight, marching in line of battle, three columns deep, apparently by divisions, their guns glistening and sparkling in the sun, and their blue uniforms seemingly black in the distance.--They drove the Confederate skirmishers before them with impunity, and when they reached point blank range received the fire of the batteries in the breastworks without staggering. Had infantry been there, perhaps another tale might have been told, but without their assistance the Confederate batteries were carried in a moment, and the long line of breastworks was theirs, and of the few men that occupied them, some fled to the rear and others to the right and left. A loud huzza, that drowned the sound of battle on other parts of the line, greeted our ears and gave assurance to our right that a success had been gained by the Federals, and disaster had befallen the Confederates. Just in rear, some two or three hundred yards, on many parts of our line, heavy forts had been erected to guard against just such results as had ensued. In rear of the line of works captured by the Federals were batteries Mahone and Gregg, but neither had guns mounted nor men assigned them. Mahone was unfinished, and was simply an embrasured battery of three guns. Gregg was a large fort, with a deep ditch in front, and its sally-ports protected in rear, and was embrasured for six guns. These two forts were all that now prevented the enemy from completely cutting the Confederate lines in two to the Appomattox, and dividing A. P. Hill and Longstreet's forces, on the right, from the main body of the army. As soon as the line of works were captured the men from all the brigades which had been forced to retire were hurried into these works. Three guns, saved from capture on the entrenchments, were put in battery Mahone, with a few men, and three also in fort Gregg, with about 300 infantry, mostly Mississippians. After reforming and getting in order, the Federals moved on these works--on Mahone first, and they took it with a rush, although the gunners stood to their guns to the last and fired their last shot while the Federal troops were on the ramparts. I was standing where I could view the whole encounter. The Confederate line to the left of the run was not attacked. The creek divided us, and the struggle was going on on one hill while we were on the opposite, about half a mile apart, anxious and breathless witnesses.