On the 18th a determined attack in force was made. Colonel Mulligan wrote: "They came as one dark moving mass, their guns beaming in the sun, their banners waving, and their drums beating. Everywhere, as far as we could see, were men, men, men, approaching grandly. Our spies had brought intelligence and had all agreed that it was the intention of the enemy to make a grand rush, overwhelm us, and bury us in the trenches of Lexington." Mulligan's men sustained the shock bravely, and the enemy met such a deadly fire that they could not get to the works. But meanwhile they had interposed a force between the works and the river, shutting off the supply of water, and they kept up a heavy bombardment with sixteen pieces of artillery. They also took possession of a large house outside the lines which was used as a hospital, and filled it with sharp-shooters. Mulligan ordered two companies--one of home guards and one from the Fourteenth Missouri--to drive them out, but they refused to undertake so hazardous a task. He then sent a company from his Irish regiment, who rushed gallantly across the intervening space, burst in the doors, took possession of the house, and (under an impression that the laws of war had been violated in thus using a hospital for sharp-shooters) killed every Confederate soldier caught inside. Two hours later the Confederates in turn drove them out and again occupied the building. Firing was kept up through the 19th; and on the 20th the besiegers obtained bales of hemp, wet them, and rolling them along before them as a movable breastwork, were enabled to approach the intrenchments. Bullets would not go through these bales, and red-hot shot would not set them on fire. Yet the fight still continued for some hours, until the ammunition of the garrison was all but exhausted. For five days they had had no water except as they could catch rain when it fell, the provisions were eaten up, and there was no sign of the promised reinforcements. There was nothing to do but surrender. Mulligan had lost one hundred and fifty men killed or wounded; the Confederate report acknowledged a loss of one hundred, which probably was far short of the truth. A correspondent who was present wrote: "Hundreds of the men who fought on the Confederate side were attached to no command. They came in when they pleased, fought or not as they pleased, left when ready, and if killed were buried on the spot--were missed from no muster-roll, and hence would not be reckoned in the aggregate loss. The Confederates vary in their statements. One said they lost sixty killed; another said their loss was at least equal to that of the Federals; while still another admitted to me that the taking of the works cost them a thousand men. I saw one case that shows the Confederate style of fighting. An old Texan, dressed in buckskin and armed with a long rifle, used to go up to the works every morning about seven o'clock, carrying his dinner in a tin pail. Taking