For those that pushed them along were in desperate hurry. Now and again a rider would twist round in his saddle to sweep back a haggard glance. Dust enshrouded them, lay heavy on every exposed inch; but through it seams of anxiety crevassed their leathern faces. Iron men they were, with one exception. Fight they could and would to the last ditch. But behind the jaded, stony eyes lay a haunting fear, the never-ending dread of a pursuit that might burst upon them at any moment. Driven to the wall, they would have faced the enemy like tigers, with a fierce, exultant hate. It was the never-ending possibility of disaster that lay heavily upon them. Just as they entered the pass, a man came spurring up the steep trail behind them. The drag drivers shouted a warning to those in front and waited alertly with weapons ready. The man trying to overtake them waved a sombrero as a flag of truce. "Keep an eye on him, Tom. If he makes a move that don't look good to you, plug him!" ordered the keen-eyed man beside one of the drag drivers. "I'm bridle wise, boss." But though he spoke with bravado Dixon shook like an aspen in a breeze. The man he had called boss looked every inch a leader. He rode with the loose seat and the straight back of the Westerner to the saddle born. Just now he was looking back with impassive, reddened eyes at the approaching figure. "Hold on, Tom! Don't shoot! It's Brad," he decided. "And I wonder what in Mexico he is doing here." The leader of the outlaws was soon to learn. Irwin told the story of the strategy that had changed him from jailer to prisoner and of the way he had later freed himself from the rope that bound him. Healy unloaded his sentiments with an emphasis that did the subject justice. Nevertheless he could not see that their plans were seriously affected. "It's a leetle premature, but his getaway doesn't cut any ice. What we want to do is to nail him, clamp the evidence home, and put him out of business before his friends can say Jack Robinson. The story now is that he was caught driving a little bunch of cows to met the big bunch his pals were rustling, and that we left him in charge of Brad while we tried to run down the other waddies. Understand, boys?" They did, and admired the more the versatility of a leader who could make plans on the spur of the moment to meet any emergency. "We'll push right on, boys. Once we get through the pass it will trouble anybody to find us. Before mo'ning you'll be across the line." "And you, Brill?" "I'm going back to settle accounts for good and all with Mr. Keller," answered Healy grimly between set teeth. "I've got a notion about him. I believe he's a spy."