"Th' stove-pipe hole is made plenty big," explained Bob, "an' that lets th' bad air out, an' we mostly has a snow tunnel leadin' t' th' door so th' wind won't strike in, an' leavin' th' door off, th' good air comes in."
Nearly four weeks had been consumed in this work, and without waiting for the reappearance of their friends they began at once the distribution of supplies among the tilts, for September was nearly spent and winter would be upon them by mid-October, when ice in the lakes would render the canoe useless.
Therefore, with all haste they proceeded with their first canoe-load of provisions to the farthest tilt, built upon the shores of the lake expansion above the falls.
It was mid-forenoon of a beautiful, transparent September day when they reached the tilt. The supplies were quickly stowed beneath the bunks, the tent stove erected, and, halting only long enough to make tea, they launched their canoe for the return.
"We'll be makin' th' river tilt before we sleeps," said Bob. "They's a moon, an' we'll finish by moonlight, an' to-morrow we'll be gettin' out with th' next load. If we travels fast we can make th' river tilt before midnight, whatever!"
The portage trail left the river at a point some ten miles below the tilt, and as previously stated, at the lower end of the lake, where the current began to gather strength for its final tumultuous rush toward the falls.
They had paddled the distance in two hours, and were congratulating themselves upon their good progress as they turned the canoe toward the portage landing, when suddenly they were startled by a burst of wild, bloodcurdling whoops, and a half-dozen strange Indians, guns levelled, rose upon the shore.
"Mingens!" exclaimed Bob.
A warning in the Indian tongue was shouted at them that they must not attempt to land. A shot was fired over their heads to emphasise the fact that the savages were in earnest, and with no alternative, and taken wholly by surprise, Shad at the steersman's paddle astern, swung the canoe out into the stream, still continuing down the river.