"Look what I've discovered." And he showed them an old wet, squashed-looking boot.

The three little girls stared.
"Whatever are you going to do with it ?" asked Kezia.
"Keep it, of course!" Pip was very scornful.

"It's a find--see ?" Yes, Kezia saw that.

All the same....
"There's lots of things buried in the sand," explained Pip.

"They get chucked up from wrecks.Treasure.