'I think it will be morning soon,' said Peggy. 'We seem to have slept for a long time. Bobby, dear, the water is rising so fast that I don't think we shall be able to stay here much longer, but I have a plan which I think we might perhaps carry out. Joe told me that people say the cave was really only the entrance to a secret passage which runs to the Abbey, and in the old days the smugglers used to carry their goods up there, and hide them away amongst the ruins. We must try and cross by that plank, and see if there is really any possible opening, except by the river.'