They looked at one another in despair. "Any good wading out to sea and keeping under water?" asked Jill.
"No," said Andy, "we'd have to keep popping our heads up to breathe and we'd be seen at once."
Jill stared at the rocks nearby and then she gave such a squeal that Andy and Mary jumped in fright.
"Sh!" said Andy angrily. "You'll be heard. Whatever's the matter?"
"I've thought of how to hide!" said Jill breathlessly. "It's the same idea I had for hiding that boat. Can't we cover ourselves with sand, and then drape ourselves with seaweed, to look like rocks? We could go and lie down beside those rocks, and if we were well covered with weeds we'd look exactly like them!"
"Golly! That is an idea!" said Andy at once. "Quick! I'll cover you girls with sand at once. Come over here."
The three ran to the rocks. The tide was out, and the sand was hard but damp. Andy made the girls lie down together, and then he piled sand high over them, leaving a space over their noses for breathing. He only had his hands to do this, so it was hard work. Then he dragged great handfuls of seaweed from the rocks and threw it over the sandy mound. When he had finished, the girls looked exactly like the seaweed-covered rocks nearby! It was really marvellous.
Andy covered with loose seaweed the untidy places he had made in the sand. Then he began to make a hole for himself, and to cover himself too. He draped himself with piles of seaweed and then poked up his head to look at the girls.
He really didn't know which of the rocks they were! He simply couldn't tell! He looked and looked—but not until one of the rocks moved a little did he see that it was the girls I
"Jill! Mary!" he called in a low voice. "As soon as you hear me screaming like a gull you must lie absolutely still. You look marvellous! I didn't know which rock you were till one of you moved."