“A waterfall!” repeated Stasch, who was much interested. But they had scarcely passed through one or two bends in the gorge when they suddenly perceived an insurmountable obstacle lying across their path.

Nell, who had been lulled to sleep by the regular motion of the horse, awoke at once.

“Are we stopping to put up here for the night?” she asked.

“No; but look!” answered Stasch. “See, a rock is lying across the gorge!”

“What can we do?”

“It is impossible to creep alongside of the rock, for it is very narrow just here, and so we must turn back a little way and try to climb to the top and go around it; but as there are still two hours before night-fall we have plenty of time, and this will give the horses a chance to get their wind. Do you hear the waterfall?”

“I hear it.”

“That’s where we’ll halt for the night.”

He then turned to Kali and ordered him to climb up the side of the narrow pass to see whether the bottom of the gorge was blocked with more obstacles. As for Stasch, he began to inspect the rock very carefully, and after a while he exclaimed:

“It must have broken off and fallen down here very recently. Do you see where it has broken off, Nell? See how fresh the break is. There is not even moss or in fact any other kind of plant to be seen on it. I understand now—I understand!”