"Yes. You see, you solved the mystery of the ghost of Elm Island, and I don't see why you can't do the same thing for Kenyon's Folly."
"But that ghost, on the island—was a natural one," said Grace. "And the boys helped us to discover what it was."
"Very well," said Mr. Lagg, calmly. "I've no objection to the boys helping you in this case. In fact, it might be better. But what I want to know is. could you—and would you—dare try to solve the ghostly mystery?"
The girls looked at one another. Amy was shaking her head in the negative. Betty and Mollie seemed interested, for they were born leaders, Betty especially. Grace reached for another chocolate, always a source of inspiration for her.
"Of course I'm not asking you to give up your time and go to a lot of trouble for nothing," resumed Mr. Lagg, quickly. "I am willing to pay you well. So I make you this offer. If you can discover what makes those ghostly sounds and manifestations, and can show me a way to get rid of them, if they are natural, which I am sure they are, why, I'll pay you a good sum. I can afford to, for I can then sell the mansion to the sanitarium doctors. Will you try it?"
"But if those doctors are interested in depre-
