The rock isn't worn a bit, but looks as sharp as if it had only lately been split." "But what could split it?
The lightning ?" "No: father says these rocks crack from the water washing the stuff away from beneath them, and then the tremendous weight does the rest.

But I don't know.

I say, though, I shouldn't wonder if this goes on into another cave.

Look here." Mike pressed forward, and found, as his companion held up the light, that the fault in the rock shot off sharply now to the left, and sloped up at an angle of some forty-five degrees.
"Looks awkward," said Mike.

"Are we going up there ?" "Of course.