He turned his gaze toward Farnum, farthest from the center, but who had overheard the conversation.

“You see, Mr. Farnum,” he said, “when the reindeer come dashing down, Lupo’s men will have to run for it to get out of the way. A stampeding herd isn’t anything to monkey with, I expect. Then you’ll have your chance. But the reindeer won’t dash in among these few close-set trees, so you’ll be safe. No, sir; as I figure it, they’ll just head right on past here and try to get through the hills beyond.”

Farnum’s glance approved.

“A fine idea,” he said, but then he added in a tone of doubt: “I don’t know as I ought to let you go, though. Mr. Hampton wouldn’t like it, maybe, putting yourself into danger like that.”

“Oh, nonsense,” said Frank. “I can slip unseen into the water. And I can swim like a seal. Ask Bob.”

And at once, to prevent any interruption of his plans, he resumed worming his way to the bank of the river.

The river ran at this point between six-foot banks, and the clump of trees in which camp was situated stood so close to the water that the roots of several projected through the soil of the land. Frank had little difficulty in getting down to the water, and felt sure that he accomplished the feat unseen by the enemy. He let himself into the stream, which was of sufficient depth right up to the bank to enable him to float downstream under the protection of the high bank, without the necessity of wading out to get to deeper water.

“For God’s sake, be careful, boy,” whispered Farnum, as Frank disappeared.

Frank was naked, and unarmed except for a long knife. He had not figured out how he would set about stampeding the reindeer. He was leaving that to chance. What concerned him now was to get to a position behind the herd without discovery. He stuck close inshore, floating, his eyes roving along the edge of the bluff above him for signs of the enemy.

None was to be seen. After all, he thought, it was hardly likely that any of the enemy lay in hiding here, as none of the shots fired at them had come from so close to the river. On the contrary, the enemy lay inland, showing they had come upon the camp from the landward side. Becoming bolder, therefore, he turned over and struck out, swimming strongly, the long knife in a sheath at his belt. He felt for it several times, to reassure himself it was there and had not fallen out.