Mrs. Brant smiled. "Hurry up and get those bundles unpacked, you two. I want to hear about this mysterious business."

In a short time the three of them had stowed the week's supply of food, and Mrs. Brant produced fresh doughnuts and cold milk.

"Now," she said, "suppose you read the letter, Scotty."

Dr. Hartson Brant, Rick's dad and head of the island scientific foundation, came into the kitchen in time to hear the last remark. "Can I listen too?" he asked. "With milk and doughnuts to help, of course."

Rick personally poured the milk for his father and added doughnuts to the plate, just to save time. He couldn't admit it to Scotty, of course, but he was plenty curious in spite of his skepticism. He knew Scotty, and his pal wouldn't get excited over some silly business that Barby might write about.

Scotty produced the letter. "It's addressed to both Rick and me," he began, "and it's from both Barby and Jan. Shall I read?"

"Go on," Rick said impatiently, and had to bear Scotty's knowing grin. Scotty knew that Rick's bump of curiosity was the largest thing he owned.

"Okay. It starts with 'Dear Rick and Scotty.'"

"Interesting," Rick said. "Unusual."

"Uh-uh. Quiet, please. It goes on, 'You must come at once, both of you, because we have a ghost here. I know Rick will think I'm silly, but it's true.' And Jan put in a sentence in her own handwriting at this point that says, 'Barby is right. It's not only true, it's unbelievable.'"