She told what she had been doing on the previous day while Mrs. Stevens was at lunch. She had not been in the dining-room all the time, but had come in twice or thrice when summoned. During the remainder of the time she had been in the kitchen. Nobody had been with her there. When Nick left the house, he rode half a mile back along the road, and then dismounted and sat down under a big tree. In a few minutes a farmer's wagon came along. A young man, who looked like a farm laborer, was riding beside the farmer. He did not ride far beyond the place where Nick was sitting. In a few minutes they sat together under the tree. The young farm laborer was Patsy. "I got your message," said Patsy. "I took the chance to ride over from the station with that fellow, and I've asked him a few questions about the house where you want me to go on duty. It seems that there's no show to get in there on any pretext. I'll have to camp around on the outside like a grass-eater." "That won't hurt you, Patsy, my lad," said Nick. "The weather's good. You're to keep an eye on the whole household, but on Miss Stevens especially. "This is the way the case looks at present: The girl is doing the work on this end in connection with some confederate concealed in Colonel Richmond's house. "You understand the game. It's to work the spirit racket on Colonel Richmond until he buys the jewels from his daughter or her husband, and gives them to Miss Stevens. "You must watch for the system by which she communicates with her confederate in Richmond's house. They work the mails, but there must be some quicker means to use in emergencies. "Try to snare a letter, or get a sight of the other party. "And be sure not to jump at conclusions, Patsy. I've told you how the case looks, but it may be any other way. I haven't begun to work down to it yet." Nick mounted his horse, and Patsy strolled away in the direction of the Stevens house. When the detective got back to Colonel Richmond's, it was well along in the afternoon. He spent the remainder of his day in exploring the secret recesses of the old house. It was, indeed, a marvelous place, and Nick got a very high opinion of the ingenuity of the man who had designed its mysterious passages. He got little else, however. One or two discoveries he certainly made. They were important as indicating that somebody had recently been in the secret passages. There was nothing to show what that person had been doing there, but the probability was, of course, that he had concealed himself in the old part of the house while preparing for his operations in Mrs. Pond's room, or while escaping from them. These indications were very vague, and did not point to the principal in this affair--that mysterious thief who worked invisibly and by such strange methods. After dinner Horace Richmond took Nick aside, for what he termed a discussion of "this ghostly rot."