CHAPTER XIX
MYSTIFIED
"What can I do for you? What seems to be the trouble?" inquired the man whom Betty and the others had hailed as they rushed to the door of the strange house, and peered out into the darkness.
"We're in a haunted mansion, and the ghost has taken Mollie away!" cried Grace, hysterically. "Please make him give her up. Oh, please do!"
But Betty paid no heed to her chum. Instead she exclaimed:
"Mr. Blackford! It's Mr. Blackford—the man who lost the five hundred dollar bill!"
"What!" cried Amy.
"I certainly am that same Mr. Blackford," answered the young man, "and if these aren't the Outdoor Girls, I miss my guess!"
"That's who we are—all but one of us," spoke Betty. "Oh, it's true. Some one has Mollie a prisoner here! We tried to open the door, but
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