Then Colonel Richmond's voice arose, hoarse and trembling with emotion. "Aunt Lavina," he said, "tell me what you wish me to do. I will obey you absolutely." "I thought so," chuckled the detective. "The colonel has come to attend a spiritualistic seance." CHAPTER VI. A ROUND-UP OF SPOOK-ARTISTS. It began to look very much as if Horace Richmond's theory was correct. Certainly the colonel had fallen again into the clutches of bogus mediums. It might be that the whole plot was directed to that end, and that the transfer of the jewels to the Stevenses was only to be an incidental result of the plot. Yet so long as Miss Stevens' unusual conduct remained unexplained, it would not do to go upon this theory. "One of the principal things that Horace Richmond employed me to do," said Nick to himself, "was to break up his uncle's belief in spiritualism. I guess that this is a first-class chance to do it." He softly crept to the corner where the gliding figures had disappeared. There, as he expected, he found one of those movable panels which the bogus mediums prepare so cleverly. His experience of such affairs taught Nick exactly what he should find in the other room. There must be a little cabinet in the corner covering the other side of the sliding panel. The medium might be in it, or she might be sitting blindfold just by the door. But the cabinet was certainly not empty. Two figures had gone into it, as Nick had observed. One of these was doubtless playing the part of Aunt Lavina. The other must be waiting to appear in some other role. Nick listened. He could hear the colonel questioning the supposed spirit. The replies were put in that silly and mysterious language supposed to be appropriate to visitors from the other world. The meaning of them, however, was plain enough. Colonel Richmond was commanded to restore the jewels to Millie Stevens. This point was made so exceedingly clear, and his promise was demanded in such stringent terms that Nick was no longer able to doubt that the interests of the Stevenses were being very carefully attended to by these "spook-compellers." In view of the facts already known, it was hardly possible to reach any other conclusion than that Millie Stevens had hired this medium to do the whole job. That it was being done "to the queen's taste," Nick was forced to admit. Yet he couldn't help being sorry to believe that such a charming and beautiful girl as Millie Stevens should be mixed up in such a dirty business. He waited till Colonel Richmond had completed his solemn protestations, and then suddenly slid the panel and passed through. There was another person in the cabinet, who was, of course, instantly aware of Nick's entrance. But the place was so dark that at first the bogus ghost did not know that Nick was not one of the regular company of spirits. He had a chance to get his bearings before the discovery was made.