There was an inarticulate stir in the crowded room. From the rear seats men and women strained forward to catch every word as it fell, clear-cut and decisive, from the scientist's lips. Jarvis sat with one hand thrust into his pocket, and his keen eyes fixed upon the group of lawyers below. A casual observer of the scene might easily have mistaken his position and assigned to him the role of prosecuting attorney.
"There was an insurmountable barrier, of course," he continued, "to my making any personal examination of Mr. Glover, as I had done with the former subject. One man was innocent and unsuspecting; the other, I felt certain, would be on his guard. And he was. Since I left his service, Richard Glover has avoided me. So a more indirect means of accomplishing my task had to be devised. After some consideration I decided to enlist the aid of an ally whom I knew to be both clever and discreet."
A long-drawn sigh swept the court-room. It was that sigh, a mixture of eagerness and satisfaction by means of which an audience at a theater indicates to the actors that the performance is living up to its advertisements.
"Mr. Kenwick himself," the witness went on in his calm, even voice, "had called my attention to a certain Madame Rosalie, a spiritualistic medium, who was taking the city by storm. He had interviewed her for his paper, and from his description I imagined that she might be able and willing to assist me. So I went to see her, and at the first mention of Mr. Kenwick's name she became intensely interested."
Here Dayton's voice, sounding a curious little note of exultation, broke in again. "You have referred to this medium as 'Madame Rosalie.' Was that her professional or her real name?"
"Her professional name. Her real name, as she disclosed it to me on the occasion of my first call, was Madeleine Marstan."
Another moment of silence and then the witness proceeded. "Having told me her real name, she went on to describe her unexpected encounter, a few days previously, with Roger Kenwick, who she had thought was dead. It seemed that when Kenwick had come to her for a sitting, his name had been accidentally revealed to her by another client, and it had struck her with the force of a blow. For it recalled to her mind a horrible adventure at Mont-Mer, which she narrated for me then in detail. At first she had surmised that this must be some relative of the unfortunate young man, and she had done all she could, she said, to start him upon the track of the tragedy. When she discovered that it was the man himself, she was glad to place all her powers at my disposal. For she had returned to the city in November with two dominating purposes; first to find some employment which would bring in quick money and so pay her husband's debts and clear his name, and second to discover, if possible, the identity of the man who had led them both into the miserable Mont-Mer trap, which resulted so disastrously for every one concerned in it. She had not been able to make a stage contract, she said, for the season was too far advanced, and so she had turned to the occult, in which she had always felt a deep interest, and for which she knew herself to have an unaccountable talent. Fortunately her strange psychic ability had caught the attention of one of the university faculty and she had been given just the publicity which she needed.
"And so we deliberately plotted between us the scientific testing of Richard Glover. I prepared a list of apparently random words in which were mingled what I call 'dangerous terms'; that is, words which were connected with the adventure at Rest Hollow. When these and the other tests were ready, I induced Glover, by means of a casual suggestion from a mutual acquaintance, to seek the aid of 'Madame Rosalie.' I felt certain that if he were not intimately connected with the tragedy he would scorn this idea, and that if he were, it was exactly the time that he would turn to the supernatural for aid. And I was not mistaken. For almost immediately he called upon the clairvoyant. And his response to the tests for association was amazing even to me. If I may quote from the list of words——" He drew a folded paper from his pocket. "Among many perfectly irrelevant terms I had smuggled in such words as 'blanket' and 'window' and 'oleander.' Madame Rosalie reported that his gaze always returned to such suggestive words (despite her admonition to look at something else) before she could change the card. The subconscious response to evil association was almost perfect. There were many other tests, of course, and by the time he had completed them he had shown an intimate knowledge of the crime at Rest Hollow and an uneasiness from which any skilful psychologist could take his starting-point. And then, as a culminating incident, he supplied to the medium, quite of his own accord, the name 'Rest Hollow,' and put to her the unexpected question, 'Where is Ralph Regan?'
"Having been thus convinced that he was the man we sought, Mrs. Marstan and I continued our investigations together. She went out with him, upon several occasions, and once, by pre-arrangement, accompanied him to the theater. On the same evening I invited Kenwick, and, all at once, called his attention to Glover. The response was like match to powder. The visual image of his former warden restored, in large degree, his memory. He was eager to reëstablish the connection. Mrs. Marstan had been careful to point out Kenwick to her escort, and the result was just what we had foreseen. It was he who evaded the encounter, supplying a pretext upon which he and Mrs. Marstan immediately left the theater.
"But Glover now suspected that he was entrapped. He had already, I knew, put another detective upon Kenwick's track. When news was published of Mrs. Fanwell's arrival in Mont-Mer, and the subsequent demand to have the disappearance of her brother investigated, he decided that his only course was to act at once. Mrs. Marstan, aided by her unmistakable psychic ability, had advised him to follow his third plan, and this plan was to have Kenwick convicted of murder."