Presently the wounded man came to. His eyes opened, and he stared up into a steel mask of a face, in which two level black eyes bored into his. He remembered that face--remembered it all too well. He trembled, cowered away. "No!" he gasped, as if he had seen a ghost. "No--no!" "Yes, I'm the man," Holmes told him firmly, menacingly. "The same one you tried to ambush." He paused a moment, then said: "Do you want to live?" It was a simple question, frightening in its simplicity. "Because if you don't answer my questions, I'm going to let you lie here," Phil went on coldly. "And that would probably mean your death. If you do answer, I'll fix you up so you can have a chance." The Mexican nodded eagerly. "I talk," he said. "Good," said Phil. "Then tell me who built that machine?" "Señor Quade. Señor James Quade." "Quade!" Phil had heard the name before. "Of course!" he said. "Guinness's old partner!" "I not know," the Mexican answered. "He hire me with much money. He buy thees machine inside, and we put him together. But he could no make him work--it take too long. We watch, hear old man go down to-night, and--" * * * * * The greaser stopped. "And so he sent you to get me, while he kidnapped the old man and his daughter and forced them under the ground in their own borer," Holmes supplied, and the other nodded. "But I only mean to tie you!" he blurted, gesturing weakly. "I no mean shoot! No, no--" "All right--forget it," Phil interrupted. "And now tell me what Quade expects to do down there." "I not know, Señor," came the hesitant reply, "but...." "But what?" the young man jerked. Reluctantly the wounded Mexican continued. "Señor Quade--he--I think he don' like thees old man. I think he leave heem an' the girl down below. Then he come up an' say they keeled going down." Phil nodded grimly. "I see," he said, voicing his thoughts. "Then he would say that he and Professor Guinness are still partners--and the radium ore will belong to him. Very nice. Very nice...." He snapped back to action, and without another word hoisted the Mexican onto his back and carried him into the shack. There he cleansed the wound, rigged up a tight bandage for it, and tied the man to one of the cots. He tied him in such a fashion that he could reach some food and water he put by the cot. "You leave me like thees?" the Mexican asked. "Yes," Phil said, and started for the door. "But what you going to do?" Phil smiled grimly as he flung an answer back over his shoulder. "Me?--I'm going to fix the wiring on those disintegrators in your friend Quade's borer. Then I'm starting down after him." He stopped and turned before he closed the door. "And if I don't get back--well, it's just too bad for you!" * * * * *