'Well, don't swat over it any more,' said Billy; 'just stay with us and have a jolly time. You're sure to think of something. Or else Lucy will. We'll act charades to-night.'

They did. The rest of the islanders were an extremely jolly lot, and all the M.A.'s came out of their huts to be audience. It was a charming evening, and ended up with hide-and-seek all over the castle.

To wake next morning on a bed of soft, dry, sweet-smelling seaweed, and to know that the day was to be spent in having a good time with the jolliest set of children she had ever met, was delightful to Lucy. Philip's delight was dashed by the knowledge that he must, sooner or later, think. But the day passed most agreeably. They all bathed in the rock pools, picked up shell-fish for dinner, played rounders in the afternoon, and in the evening danced to the music made by the M.A.'s who most of them carried flutes in their pockets, and who were all very flattered at being asked to play.

So the pleasant days went on. Every morning Philip said to himself, 'Now to-day I really must think of something,' and every night he said, 'I really ought to have thought of something.' But he never could think of anything to take away the fear of the gentle islanders.

It was on the sixth night that the storm came. The wind blew and the sea roared and the castle shook to its very foundations. And Philip, awakened by the noise and the shaking, sat up in bed and understood what the fear was that spoiled the happiness of the Dwellers by the Sea.

'Suppose the sea did sweep us all away,' he said; 'and they haven't even got a boat.'

And then, when he was quite far from expecting it, he did think of something. And he went on thinking about it so hard that he couldn't sleep any more.

And in the morning he said to the parrot:

'I've thought of something. And I'm not going to tell the others. But I can't do it all by myself. Do you think you could get Perrin for me?'

'I will try with pleasure,' replied the obliging bird, and flew off without further speech.