"Well, if you promise to do exactly what you're told, you can come," said Andy, after a minute's thought. He didn't really like the idea of leaving the girls all alone again. Perhaps it would be better if they came.

The girls were thrilled. They cleared away the breakfast-things and washed up. They prepared a meal to take with them. It was a very good thing they had discovered that store cave—they now had plenty of food of all kinds. They did hope the seaplane wouldn't take everything away!

They all got into the boat. The boys rowed off, and were careful to keep to the side opposite the cave when they came to the second island. They rowed quickly over the space of water separating that island from the third one, and came to the farthest tip of ft. Here there was a tiny beach with steep, overhanging cliffs—so overhanging that it almost seemed as if a big piece was about to fall off!

"Just the place." said Andy, pulling into the tiny beach. "Jump out girls. Take the food with you. "Give a hand with the boat. Tom. we'll run it up the beach and put it right under that dangerous piece of cliff. It will be well hidden there."

They put the boat there and looked at it. The end of It jutted out and could be seen. Jill ran,to a seaweed-covered rock and pulled off handfuls of the weed.

"Let's make the boat into a rock!" she said, with a laugh. "Cover it with seaweed!"

"Jolly good idea!" said Andy. "I didn't know girls could have such good ideas!"

"You wait and see what fine ideas we have!" said Mary. They an pulled at the seaweed, and soon the boat was nicely draped and looked so exactly like a seaweed-covered rock that no one could possibly guess it wasn't, even as they passed quite near it.

"That's good." said Andy. "Now we'll make our way very carefully across this end of the island till we come to the little cove where we took our boat from. We'll just peep over the cttff and see if there's anyone there looking as though they have missed the boat! Then we'll crawl to the top of the next cliff that overlooks the submarine bay, and Tom shall take a few pictures."

Everything went well. Keeping close to tall bushes of gone and bramble, the four children crept over the tip of the island and soon came to the cliff below which was the boat-cove. Cautiously Andy parted some bramble sprays and peeped down to the beach below.