"Don't mention rapids, I beg of you," cried Sir Arthur. "It makes me nervous. I can't stand it at all."
For an hour or more they traveled on in almost unbroken silence. On either side the shore was invisible, and overhead the glare of the torch revealed only black, empty space. The same intense silence prevailed, not even the faintest murmur of the river being audible.
This peaceful monotony, however, was rudely shattered. A low humming sound was heard in the distance, which rapidly increased in volume, and left no room to doubt that a course of rapids was below. At Guy's suggestion Forbes relieved Sir Arthur of the torch, and scarcely had this change been effected when the current carried them into a swirling mass of spray.
Both canoes grated and bumped against rocks, and then, before the frightened occupants could realize that it was over, the sullen roar was fading away in the distance, and the smooth current was bearing them rapidly ahead.
This little episode considerably relieved their minds. If no more dangerous water than that lay before them, there was little cause for apprehension. A skilled eye and a strong hand would overcome the difficulty.
Presently, for the first time, rocky walls appeared, now on one side, now on the other, but they fell sheer to the water, and gave no opportunity for landing. The atmosphere of the cavern was pure and fresh, a fact not readily accounted for, since no glimmer of daylight was anywhere visible.
Guy began to grow sleepy, a sensation which was shared by his companions, for it was many hours since they had had any rest. It was impossible to tell how long or how far they had traveled. All passage of time was lost, and the periods for eating and sleeping must be regulated by their own feelings. Instinct goes wrong in such cases; yet there was little doubt that the night had come.
A sharp lookout was kept on the shores, but, as the current swept them past the same monotonous ledges without a break, it began to look as though they would be compelled to take turns at sleeping in the bottom of the canoes.
They were paddling close along the right shore when a sudden cry from Canaris, who was almost abreast of the other boat, and farther out in the current, attracted general attention, and peering out on the river they saw a dim object some yards away.
The current bore them past it, but by dint of hard paddling the canoes were headed diagonally up stream, and a few moments later a landing was made on the lower end of a small spit of white sand, ten or fifteen yards in diameter.