Before nightfall fairly level ground was reached, and this being the third day, they judged their location was fully sixty miles due west of the Cataract. Far to the south and southeast the mountains could be distinctly seen, but the Professor did not think the ranges were very high.
In the far west the cloudy aspect of the sky prevented them from judging of the character of the land, but it had the appearance of mountains, as well.
"How far away are the mountains in the south, do you think?" asked the Professor.
"I estimate them at about five miles," was George's response.
"What is your idea, Harry?"
"I don't think George is far out of the way."
"Would you be surprised if I should put it at twenty-five miles, or more?"
"What makes you think so?"
"Appearances are always deceptive when you have nothing intervening to measure by."
"Is that the reason distances on water are always so deceptive?"