The guerrillas' faces were as white as chalk, and they began to beg for their lives. They had only just joined Porter, they declared, and they were sick of it already. They had never molested a Union man. In fact, they had told a lie--they were deserting, instead of going to visit their families, as they said. "If that is the case," said Lawrence, "you will readily give us all the information you can. No doubt Colonel McNeil will be pleased to see you; so come along." It was as the prisoners had said--the guerrillas had gone, and Lawrence had no trouble in riding into Paris, where he was gladly welcomed by McNeil, who had been in fear he was being attacked by an overwhelming force. It was welcome news that Lawrence brought, that Colonel Guitar was in Mexico by this time, with five hundred good men; but that Porter was retreating north, was a big surprise to McNeil. "He must have at least a thousand men," said McNeil. "I thought he would stay and fight this time, sure. I see we will have to chase the fox." During the night the advance of Colonel Guitar's column came in. Guitar had been taken sick at Mexico, but had sent forward five hundred men under the command of Lieutenant-Colonel Shaffer. McNeil, his force now augmented by Shaffer's, resolved to push Porter to the limit, and if possible bring him to battle. A pursuit now commenced which lasted a week--a pursuit that every soldier that was present will always remember. Men grew haggard for want of sleep; horses staggered under the weight of their riders, and then fell dying by the side of the road. Across prairies and streams, through woods and tangled thickets, over rocky hills, almost inaccessible, the pursuit led. By every art known to the wily Porter did he try to mislead his pursuers; but they hung on to his trail like grim death. More than once would the pursuers have been at fault had it not been for Lawrence and his little band of scouts. Hanging on to the flank and at times almost ahead of Porter, they were enabled to keep McNeil well posted as to the movements of his foes. More than once did the faithful Bruno keep the scouts from falling into ambuscades, and more than once shots were fired at him by the vengeful guerrillas. But Bruno had become as cunning and wary as a fox in keeping out of danger. It was but a glimpse the guerrillas could get at him as he stole through the woods. "What now, Bruno? What's the matter?" asked Lawrence one day, as the dog came rushing back in the greatest excitement. The scouts were in advance, and had been following the trail through a rough and broken country. The dog gave a short bark, and looked to the front, as if to say, "Look out--trouble ahead."