"What is it? A man?" asked Moore. "That is conjecture as yet," said Oakes. "I certainly beard the sound made by a woman's skirts, or something of that sort, but the strength was too great for most women hereabouts." "Yes, if you were overcome by it," I remarked. "The servants are firmly convinced that the whole business is supernatural. That is hardly worth discussing. I have no doubt that you two gentlemen, as possible purchasers of the Mansion, will have opportunities to settle the question for yourselves." There was just the shadow of a smile on Oakes's face as he spoke. "Did you notice anything peculiar about the people at the Mansion—the care-takers?" I asked. "No, I thought their actions were natural, especially when I was assaulted. One of the gardeners, who did not do very much to help me, seemed preoccupied and made advances for a better acquaintance before I left. I think he will bear watching closely; he knows something." "How long did you remain at the Mansion after the assault?" [Pg 37] [Pg 37] "Only a few days," said Oakes. "I could learn nothing alone. It was too dangerous. When we return, it will be in greater numbers. If our mission is suspected we will be obliged to work through other channels, but I think we can fool the care-takers; they will say nothing to you about the mystery, and they will think that I am more anxious than ever to dispose of the place. Should our work be suspected, however," continued the detective, "we will be face to face with complications. We may have to be reënforced by men from my agency, but they will probably not be known even to you." "The reward for the solution of this mystery is a large one, and the prosperity of the town depends upon it. This matter at the Mansion has not only affected its own value, as I said, but has helped greatly to depreciate the worth of the surrounding properties." Then, turning to Moore: "I think your professional knowledge may come in handy in several ways, so you may consider that your time will be well paid for, and your vacation a profitable one—that is, of course, if you return alive." [Pg 38] [Pg 38] This was so seriously said as to cause me a momentary feeling