"Ah, Miss Aitken! Late for lunch again!"

Caroline started guiltily, for it was the voice of Bluelegs.

Joan threw her arm over Caroline's shoulder carelessly.

"Yes, Dr. Ferris, I'm afraid I am," she said. "I was delayed by this little visitor."

He looked suspiciously at them. "Who is she?" he asked.

"I don't know." Joan led Caroline along quickly. "She says she is Mary Queen of Scots."

He stared blankly.

"I found her conversing with Marie Antoinette," she went on easily, "and she seems to have slipped in with an automobile party—was there one? Children are so secretive, you know. She is trying to get out, but she says all the gates are locked."

"Oh, yes, that was the Dahls—they came to see Frederick," he explained.

"I see. You were left with the chauffeur, Mademoiselle, and it's easy to imagine the rest," he added with a smile. He had a very attractive smile, and Caroline slipped her hand into his offered one readily.