...in his front, he made no effort to relieve Sedgwick from his perilous position. Works were thrown up by the enemy along the Salem Church ridge, and they extended their right until on Monday morning Marye's Heights and Fredericksburg, won at so great a sacrifice, were again theirs. Sedgwick's position, as finally established, was in the shape of a horseshoe, both flanks resting on the river, the line coveri...