Now that I think of it, there are springs and bodies of water which rise and fall this way, some of them in our own Western country, but none of them are as large as this.

What if it should rise in the night and flood the cave while we are asleep ?" "Why, dear Mrs.Cliff," said Edna, "I am not afraid of the water's rising or of the earth's sinking.

Don't let us frighten ourselves with imaginations like that.

Perhaps there may not even be any real thing to be afraid of, but if there should be, let us keep courage for that." The disappearance of the lake gave the captain an uneasiness of which the others had not thought.

He saw it would be comparatively easy for the Rackbirds to gain access to the place through the cleft in the eastern wall of the lake cavern.