I came to myself on the floor of a lighted room, with Hewitt's face over mine. My wrist seemed broken, though it was free, there was oil and blood on my clothes, and in my left hand I still gripped a piece of Mayes's coat.

"Stop him!" I cried. "He's gone by the stable! Have they got him?"

"No good, Brett," Hewitt answered soberly. "You did your best, but he's gone, and Peytral after him!"

"Peytral?"

"Yes. He brought his own message to town. But see if you can stand up."

I was well enough able to do that, and, indeed, I had only fainted from the pain of the strain on my wrist. Several policemen were in the room, beside Hewitt and Plummer. Mayes's stronghold was in the hands of his enemies.

Then I suddenly remembered.

"The Admiralty code!" I cried. "It was in the office desk. Have you got it?"

"No," Hewitt answered. "Come, Plummer, up the ladder!"

Little time was lost in forcing Mayes's desk, and there the document was found, grey cover, red tape and all intact. The police were left to make a vigorous search for any possible copy, and the original was handed to Plummer, as chief representative of the law present. He had been trapped precisely as I had been, except that he had been led further, and shut in a cellar as well as fastened by the wrist. Mayes, it seemed, had wasted very little time in attempting to pervert him, and I have no doubt that, whatever fate might have been reserved for me, Plummer would never have left the place alive had it not been for the timely irruption of Hewitt, with Peytral and the police.

In half an hour Peytral returned. He had dashed out in chase of the fugitive, but failed even to see him—lost him wholly in the courts, in fact. For some little while he persevered, but found it useless.

The dirty-whiskered man made no attempt to escape, though there was talk of another man having got away in the confusion by way of the stable roof. The police were left in charge of the place, and we deferred a complete exploration till the next day.

Hewitt's tale was simple enough. He had endued himself in somewhat seedy clothes, and had visited 37 Raven Street, Blackfriars, which he found to be merely a tenement house. It took some time to make inquiries there, with the necessary caution, because of the number of lodgers; and then the inquiries led to nothing. It was an experience common enough in his practice, but none the less an annoying delay, and when he returned to his office he found Mr. Peytral already awaiting him. Peytral described his following of Mayes at much greater length and detail than before, and he and Hewitt had come on to Norbury Row at once and asked news of Mr. Moon.

Mr. Moon's description of the successive disappearances of Plummer and myself, and of our continued absence, so aroused Hewitt's suspicions that he instantly procured help from the nearest station, and approached the door of Mayes's office. A knock being unanswered, the door was instantly broken in. The room was found to be unoccupied, but the ladder was still standing at the open window, by which Mayes had descended to the back premises. Down this ladder Hewitt went, with the police after him. The rest I had seen myself.

"But what," I said, "what is this mystery? Why did Telfer give up the code, and what is the power that Mayes talks of?"

"It is a power," replied Hewitt, "that I have suspected for some time, and now I am quite sure of it. A secret, dangerous and terrible power which I have encountered before, though never before have I known its possibilities carried so far. It is hypnotism!"

"Hypnotism!" I exclaimed. "But can a person be hypnotised against his will?"

"In a sense, in most cases, he cannot. That is the explanation of Mayes's proposals to you to go through a 'form of initiation.' If you had consented, the 'form' would have been a process of hypnotism. Once or twice repeated, and you would have been wholly under his control, so that if he willed it and forbade you, you could tell nothing of what he wished kept secret, and you would have committed any crime he might suggest. Consider poor Jacob Mason! Remember how he struggled to tell what he knew, oppressed by the horror of it, and how it all ended! And remember Henning the clerk, Mayes's tool in that case of bond robbery! What has happened to him? He committed suicide, as you know, immediately after Mayes had left him at the barn. Brett, this power of hypnotism, a power for healing in the hands of a good man, may become a terrible power for evil in the hands of a villain!"

"But Telfer, to-day? He seems to have known nothing of Mayes, and he was not one of his regular creatures—Mayes himself told me so."

"About that I don't know. But I expect we shall find that he has been willingly hypnotised at some time or another, perhaps more than once, by this same scoundrel Mayes. Possibly in one of Mayes's appearances in respectable society, at an evening party, or the like. In a case of that sort the hypnotist may impress a certain formula—a word, a name, or a number—on the subject's mind, by the repetition of which, at any future time, that same subject may be instantly hypnotised. So that, once having become hypnotised, on any innocent occasion, the subject is in the power of the hypnotist, more or less, ever after. The hypnotist says: 'When I repeat such and such a sentence or number to you in future, you will be hypnotised,' and hypnotised the subject duly is, instantly. Supposing such a case in this matter of Mr. Telfer, it would only be necessary for Mayes to meet him in the corridor, repeat his formula and command the victim to bring out the paper he specified. This done he could similarly order him to forget the whole transaction, and this the victim would do, infallibly."

It is only necessary to say here, parenthetically, that later inquiry proved the truth of Hewitt's supposition. Twice or three times Mr. Telfer had been hypnotised in a friend's chambers, by a plausible tall man whose acquaintance his host had made at some public scientific gathering. And in the end it became possible to identify this man with Mayes.

Mr. Moon, of "The Compasses," was of great comfort to me that evening. My cuts and bruises were washed in his house, and my inner man revived with his food and drink.

"Allus glad to oblige the p'lice," said Mr. Moon; "allus. 'Cos why? Ain't they the p'lice? Very well then!"