The native guide had passed beyond the next ice-pile. Rover had followed.
But the boy's college days had not been for naught; he knew a trick or two. As if stunned by the fall, he relaxed and lay motionless. Seeing this, the man took time to plant his knees on the boy's chest before moving his horny hands toward his throat.
The next instant, as if thrown by a springboard, the man flew into the air. Phi sprang to his feet, his one thought of escape. Turning, he dashed around an ice-pile, then another and another. But fate was not with him. Just at the moment when he felt that he could elude his pursuer, his foot struck a crevice in the ice, and he went sprawling. Again the wild terror was upon him.
But this time there came tearing over the ice a new wild terror, and this one his friend. Old Rover, silent and determined, sprang clean at the man's throat. The assailant went down, striking out with hands and feet, and roaring for mercy.
Phi dragged the dog off. "Get!" he said. The man looked surly, but one look at the determined boy and the eager jaws of the dog set him slouching away.
"You're some dog!" the boy laughed at the old leader. "Well, now, I'll say you are!"
CHAPTER XII
"WHAT IS THAT?"
When the man had gone, Phi sat down upon an up-ended ice-cake to rest and think. His logical course was evident enough; to wait for perhaps half an hour, allowing the man, who would doubtless be able to overtake his guide, to get a sufficient distance ahead to prevent any further unpleasant encounters. Still, he was glad now to have his rifle, small as it was. He had brought only a few cartridges for it, as they were an added weight. These had been spilled from his pocket in the scuffle, but by a diligent search he was able to find five. He was about to abandon the search when, with an exclamation of astonishment, he sprang forward, and bending, picked up an envelope.
"The blue envelope," he exclaimed. "My blue envelope. He must be the bearded miner the girls told me about. It was lucky he tried to assassinate me after all."