Now I must go back to Ruthven." Frank found it even harder work to get back than it had been to come out from the bay, for the tide was against him now.

At last he stood beside Ruthven and Childers.
"We can only find one place, Frank, where there is any projection a fellow could stand upon, and that is only large enough for one.

See!" he said, pointing to a projecting block of chalk, whose upper surface, some eight inches wide, was tolerably flat.

"There is a cave here, too, which may go beyond the tide.

It is not deep but it slopes up a bit." "That will never do," Frank said; "as the waves come in they will rush up and fill it to the top.