CHAPTER VII
IN THE MUD
Mr. Lagg looked hopefully from one to the other of the Outdoor Girls. Clearly he was very much in earnest over his strange offer, and he saw nothing out of the ordinary in it. But it must be admitted that it is not every day four girls are asked to take a motor tour and solve the mystery of a ghost-haunted house. Betty and her chums evidently realized that.
Betty finally spoke.
"Well," she said, slowly, "we would like to do you a favor, Mr. Lagg, and we wouldn't want you to pay us"
"I won't have you undertake it on any other basis," he interrupted. "If you solve that mystery for me it will be a big favor, and worth paying for. I might make up a verse about that part of it, but I won't take your time. But please consider it."
"If we did it at all," spoke Mollie, "we would do it as a favor to you, for you have been very
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