Everything depended upon initiating the movement before it was discovered by the enemy, but the delays, which perhaps were unavoidable, revealed the truth to Lee. When Sumner's division reached a point opposite Fredericksburg they saw the Confederates on the other side awaiting them. Still the force was so meagre that Sumner wished to cross and crush it, but Burnside would not permit. The delay gave Lee time to bring up his whole army and make his position impregnable. He stationed a battery some miles below the town to prevent any Union gunboats coming up stream, while every ford was closely guarded. Burnside faltered before the position that was like a mountain wall, but the North was clamorous for something to be done, and he decided to make the hopeless attack. One hundred and forty-seven cannon were posted, on the night of December 10th, so as to command the town and cover the crossing of the river. Unable to prevent this, Lee made his preparations to annihilate the Unionists after they had crossed. UNION DISASTER AT FREDERICKSBURG. In the face of a brisk fire, a force was sent over the river and occupied the town, while Franklin laid his bridges two miles below and crossed without trouble. When the cold, foggy morning of December 13th broke, the whole Army of the Potomac was on the southern shore and the Confederate army was on the heights behind Fredericksburg. As the fog had cleared to some extent, General Franklin advanced against the Confederate right, but, misunderstanding Burnside's order, he made only a feint. Fighting was kept up throughout the day, and once General Meade forced a gap in the enemy's line, but he was not reinforced, and was driven back with severe loss. The attack on the right having failed, Sumner threw himself against the left. This required the seizure of Marye's Hill, and was hopeless from the first. As the Union troops emerged from the town they were in fair range of an appalling fire that mowed down scores. Still they pressed on with a courage that could not be surpassed until one-half lay dead and dying, when the rest staggered backward out of the furnace-blast of death. The gallant Hancock gathered up the fragments of the shattered line, and, uniting them with his own men, numbering 5,000 in all, he led a charge, which in a brief while stretched 2,000 dead or wounded. Still the survivors held their ground and were joined by others, who fell so fast that it was soon evident that every man would be killed. Then grimly remarking, "I guess we have had enough killed to satisfy Burnside," Hancock ordered the brave fellows to fall back.