“You had it on this morning,” said Peggy. “I remember seeing it, and thinking it was getting very dirty and floppy. Oh, Mike dear! Where can you have left it? Think hard, for it is very important.”
“It might be the one thing that gives us away,” said Jack.
"There’s just time to go and look for it,” said Mike. “I’ll go and see if I can find it.”
He crawled through the narrow passage and out into the cave with the low entrance. He squeezed through that and went out into the sunlight. He could see the boat from where he was, being rowed through the water some distance away. He ran down the hill to the beach. He hunted there. He hunted round about the hen-yard. He hunted by the spring. He hunted everywhere! But he could not find that hat!
And then he wondered if it was anywhere near Willow House, for he had gone there that morning to store the hen-yard fences. He squeezed through the thickly growing trees and went to Willow House. There, beside the doorway, was his hat! The boy pushed it into his pocket, and made his way back up the hillside. Just as he got to the cave-entrance he heard the boat grinding on the beach below. The searchers had arrived.
He crawled into the big inner cave. The others greeted him excitedly.
“Did you find it, Mike?”
“Yes, thank goodness,” said Mike, taking his hat out of his pocket. “It was just by Willow House - but I don’t expect it would have been seen there, because Willow House is too well hidden among those thick trees to be found. Still, I’m glad I found it - I’d have been worried all the time if I hadn’t. The boat is on the beach now, Jack; I heard it being pulled in. There are four men in it.”
“I’m just a bit worried about the passage to this inner cave from the outer cave,” said Jack. “If that is found it’s all up with us. I was wondering if we could find a few rocks and stones and pile them up half-way through the passage, so that if anyone does come through there, he will find his way blocked and won’t guess there is another cave behind, where we are hiding!”
“That’s a fine idea, Jack,” said Mike. “It doesn’t matter about the other entrance, because no grown-up could possibly squeeze through there. Come on, everyone. Find rocks and stones and hard clods of earth and stop up the passage half-way through!”