“You know, they suspect us of knowing about their prisoner,” said Jack. “They’ll be on the look-out now, more than ever. I guess we shan’t be able to do much more signalling to the prisoner boy.”

“Why did you make me leave the bundle of rope behind?” asked Mike. “I thought if I took it with me that we could undo it and get on with the ladder here in our bedroom, after tea.”

“But, Mike, Mrs. Diaz is sure to guess we’re up to something if you go lugging bundles of rope about,” said Jack. “We’d far better go back and get it after tea.”

“You’re right as usual, Captain,” said Mike.

So after tea they went back to the boat to get the rope, and took it up to their room. The tide was in and there was nothing to do on the beach. It would be fun to make the ladder.

“What are you all doing up there?” called Dimmy, in surprise. “Aren’t you going out this evening?”

“No, Dimmy. We’ve got a secret on,” called back Nora. “You don’t mind, do you?”

“Not a bit!” said Dimmy, and went back to her washing-up. The children worked hard at the rope. Soon they had a great deal of it untangled, and they found that it was good strong rope, knotted here and there. They chose two long lengths, and then Mike went down to get the little stakes from the shed. He soon came back with them. Jack showed the others how to knot the ends of the stakes firmly to the sides of the rope-ladder. The stakes were the rungs. Soon the ladder took shape under their hands.

“Doesn’t it look fine!” cried Peggy. “I’m simply longing to use it! Do let’s use it to-night, Jack!”

Jack has an Adventure