...ccess of the day was in a large degree due to the skill and coolness of the latter, who, as holding the hottest part of the Union line, was gradually re-enforced by the brigades of Caldwell, Sickles, Meagher , and several of Porter's, till he came to command the whole left centre, displaying in his conduct of the battle a high order of generalship. Night closed on the combatants still fighting, the op...