"It must be the water?"
"There is nothing else to make a noise down here."
"I once heard the roar of the great fall at Niagara, and that brings it to my mind. Let us move on," said Sam.
Again they resumed their journey.
At times they were forced to creep along the edge, knee deep in water, but they did not mind this.
After going about three hundred yards further down, they came to an irregular rock, up whose sides they climbed in the hope of getting a better view of the river below.
They were not disappointed in their purpose, but the prospect that met their gaze was well calculated to dismay the stoutest heart.
Their vision was limited by a bend in the river a quarter of a mile below, but between this and the rock on which they stood, the water was white with foam as it roared and tumbled over a series of rapids, in the midst of which black rocks appeared like the heads of monstrous creatures.
This sight was so appalling that neither Sam nor Ulna could utter a word for some seconds, but stood looking from the maddened waters into each other's frightened face.
Sam was the first to speak: