“Well, when you see a big black hole in the side of a hill, isn’t that a cave?” asked Freddie.
“It surely is,” said his father.
“An’ when you hear somebody making a big noise like ‘Boo-oo-oo-oo! Boo!’ maybe that’s a giant, like it is in the story,” said Flossie.
“Oh, I guess perhaps you heard the wind moaning in a cave,” said Captain Crane.
“No, there wasn’t any wind blowing,” Freddie said. And, surely enough, there was not. The day was clear and calm.
“We heard the booing noise,” Freddie said.
“Are you sure it wasn’t a mooing noise, such as the cows make?” asked Nan.
“There aren’t any cows on Orange Island; are there, Cousin Jasper?” asked Bert.
“I think not. Tell me, children, just what you heard, and where it was,” he said to Flossie and Freddie.
Then the little twins told of walking along the hill that led up from the beach and of seeing a big hole—a regular cave. They went in a little way and then they heard the strange, moaning sound.