"What is that?" Stas exclaimed. "Are there a river and waterfall ahead of us?"
Kali nodded his head in sign that obviously such was the fact.
And for some time they rode more quickly, listening to the roar which each moment became more and more distinct.
"A waterfall!" repeated Stas, whose curiosity was aroused.
But they had barely passed one or two bends when their way was barred by an impassable obstruction.
Nell, whom the motion of the horse had lulled to sleep, awoke at once.
"Are we already stopping for the night?" she asked.
"No, but look! A rock closes the ravine."
"Then what shall we do?"
"It is impossible to slip beside it for it is too close there; so it will be necessary that we turn back a little, get on top, and ride around the obstruction; but it is yet two hours to night; therefore we have plenty of time. Let us rest the horses a little. Do you hear the waterfall?"