"North," replied Lennon, without a moment's hesitation. Though he had been lost since leaving the trail, he clearly remembered all the directions given by the old prospector as to the position of the lode in relation to Triple Butte. From the top of the mesa practical railway routes appeared to offer to the east and north of the great butte. Lennon studied the landscape until he noticed that the Navaho leader had headed south of east instead of north. Certain that his reply to Slade had been misunderstood, he spurred forward to explain that they were veering away from the lost lode. Slade rode on without a word of acknowledgment. The presence of the Navahos made his contemptuous silence doubly galling. Lennon took it as a foretaste of what was to come and masked his chagrin. For Elsie's sake, he could not afford to quarrel with Slade at this stage of the dangerous game that must be played. CHAPTER XVI THE DROP At sunset the reason for the guide's choice of route disclosed itself. The party came to a group of small springs. Lennon's throat had been parched for the last two hours. He spurred his jaded pony forward to the mesquite bushes where the Navahos were unsaddling, and slipped off to dip his empty canteen in the largest spring. The guide muttered gutturally to Slade who was staring up narrow-eyed at the broken shoulder of Triple Butte. He wrenched himself about to scowl at Lennon. The engineer had straightened and was raising the half-filled canteen to drink. "Hey, you!" bellowed Slade. "Drop that!" The bullying command was more than Lennon could endure. He waved the canteen ironically at the trader, turned half away, and put the opening to his mouth. Slade whipped out his revolver and fired. The canteen flew out of Lennon's hand and thumped down upon the stone beside the spring. For a moment Lennon was so astonished that he stood motionless, staring down at the canteen. The water gushed and gurgled through the holes pierced through the middle of the vessel by the heavy bullet. The first coherent thought of the engineer was that Slade had intended to murder him. He put his hand to the pocket that held Farley's revolver and turned to face Slade. The trader's weapon was already back in its holster. His stained teeth showed in a wide grin. "May I ask what you mean by shooting at me?" demanded Lennon. Slade's mirth burst out in a roar of laughter. "Shooting at you--shooting _now_?" he jibed when he could speak. "You must figger I'm plumb loco. Any fool ought to know anybody would hold off till you located the mine. Even supposing I was going to plant you, I'd wait, wouldn't I, huh?" Lennon saw the point even clearer than the trader intended. He was supposed to take the piece of grim humour as a reassurance. The derisive banter was an unintentional notification that he could expect to be murdered immediately after the finding of the lost lode. But until then he must continue to play the dupe.