must be a dull job," I remarked, "hanging about by the hour to see a man come out of a house."
"Very," Thorndyke agreed. "I am quite sorry for the worthy person, especially as we are going to play him a rather shabby trick presently."
"What are we going to do?" I asked.
"We are going to let him in for one of the longest waits he has ever had, I am afraid. Perhaps I had better give you the particulars of our modus operandi. First, I shall send down to the stand for a hansom, which will draw up opposite the club; and thereupon I have no doubt our friend will hurry down to the cab-stand to be in readiness. At any rate, I shall let him get down to that end of the street before I do anything more. Then I shall take the liberty of putting on your coat and hat and go out to the cab with your suit-case in my hand; I shall stand on the kerb long enough to let our friend get a good view of my back, I shall get into the cab, give the driver the direction through the trap to drive to the hospital, and pay the fare in advance."
"Why in advance?" I asked.
"So that I shall not have to turn round and show my face when I get out at the hospital entrance. I assume that your friend will follow me in another hansom. Also that he will alight at the outer gates, whereas I shall drive into the courtyard right up to the main entrance, so that he will merely see your hat, coat and suit-case disappear into the building. Then, as I say, he will be in for an interminable vigil. I have a lecture to give this afternoon, and, when I have finished, I shall come away in a black overcoat and tall hat (which are at this moment hanging up in the curator's room), leaving your friend to wait for the reappearance of your coat, hac and suit-case. I only hope he won't wait too long."
"Why?"
"Because he may wear out the patience of my assistant. I have a plain-clothes man keeping a watch from the window above. If your friend sets off in pursuit of your garments, as I anticipate, the plain-clothes man will go straight to the hospital and take up his post in the porter's lodge, which, as you know, commands the whole street outside the gates."
"And what have I got to do?"
"First of all, you will put your tooth brush in your pocket—never mind about your razor—and let me try on your hat, in case we have to pad the lining. Then, when you have seen your friend start off in pursuit and are sure the coast is clear, you will make straight for my chambers and wait there for me."
"And supposing the chappie doesn't start off in pursuit? Supposing he twigs the imposture?"
"Then the plain-clothes man will go out and threaten to arrest him for loitering with intent to commit a felony. That would soon move him on out of the neighbourhood, and the officer might accompany him some distance and try to get his address. Meanwhile, you would be off to King's Bench Walk."
"But wouldn't it be simpler to run the Johnnie in, in any case? Then we should know all about him."
"No, it wouldn't do. The police wouldn't actually make an arrest without an information; and, if they did proceed, they would want me to appear. That wouldn't suit me at all. Until we obtain some fresh evidence, I don't want this man to get any suspicion that the case is being investigated. And now I think the time has come for a move. Let us go to the cloakroom and see if your hat fits me sufficiently well."
It was not a good fit, being just a shade small; but, as it was a soft felt, this was not a vital defect. The overcoat fitted well enough, though a trifle long in the sleeves, and when Thorndyke was fully arrayed in this borrowed plumage, his back view, so far as I could judge, was indistinguishable from my own. "If you will take out your toothbrush and hand me your suit-case," said he, "I will send for a hansom, and then we will watch the progress of events from the dining-room window."
I handed him the green canvas case and we returned to the dining-room and there, when he had ordered the cab, we took up a position at the window, screened from observation by the wire blinds. "Our friend," said Thorndyke, "was walking towards the right hand end of the street when we saw him last. As the cabstand is at the left hand end, we may hope to look upon his face once again."
As he spoke, the air was rent by the shriek of the cab-whistle, and the leading hansom began immediately to bear down on the club. It had hardly come to rest at our door when a figure appeared from the opposite direction, advancing at a brisk walk on our side of the road. I recognized him instantly as the man to whom Thorndyke had directed my attention, and watched him closely, as he approached, to see if I could identify him with the man who had shadowed Sylvia and me at the picture gallery; but, though he passed within a few yards of the window, and I felt no doubt that he was the same man, I could trace no definite resemblance. It is true, that while actually passing the club, he averted his face somewhat; but I had a good view of him within an easy distance, and the face that I then saw was certainly not the face of the man at the gallery. The skilfulness of the make-up—assuming it to be really a disguise—was incredible, and I remarked on it to Thorndyke. "Yes," he agreed, " a really artistic make-up is apt to surprise the uninitiated. And that reminds me that Polton has instructions to make a few trifling alterations in your own appearance."
I stared at him aghast. "You don't mean to say," I exclaimed, "that you contemplate making me up?"
"We won't discuss the question now," he replied a little evasively. "You talk it over with Polton. It is time for me to go now, as our quarry has considerately acted up to our expectations. He little knows what confusion of our plans he would have occasioned by simply staying at the other end of the street."
The spy had, in fact, now halted opposite the cabstand and was apparently making some notes in a pocket-book, facing, meanwhile, in our direction. With a few parting instructions to me, Thorndyke picked up the suit-case and hurried out, and I saw him dart down the steps—with his face turned somewhat to the right—and stand for a few seconds at the edge of the pavement with his back to the cabstand, but in full view, looking at his watch as if considering some appointment. Suddenly he sprang into the cab and, pushing up the trap, gave the driver his instructions and handed up the fare. At the same moment I saw the unknown shadower hail a hansom, and, scrambling to the footboard, give some brief directions to the driver. Then Thorndyke's cabman touched his horse with the whip, and away he went at a smart trot; but hardly had the cab turned the first corner when the second hansom rattled past the club in hot pursuit.
I was about to turn away from the window when a tall, well-dressed man ran down the steps and immediately signalled to the cabstand with his stick. Thinking it probable that this was the plain-clothes policeman, I stopped to watch; and when I had seen him enter the cab and drive off in the same direction as the other two, I decided that the show was over and that it was time for me to take my departure; which I did, after stuffing a couple of envelopes into the lining of Thorndyke's hat, to prevent it from slipping down towards my ears.
That my arrival at number 5A, King's Bench Walk was not quite unexpected I gathered not only from the fact that the "oak" stood wide open, revealing the inner door, but from the instantaneous way in which this latter opened in response to my knock; and something gleeful and triumphant in Mr. Polton's manner as he invited me to enter, stirred my suspicions and aroused vague forebodings.
He helped me out of my—or rather Thorndyke's—overcoat, and; having taken the hat from me, peered inquiringly into its interior and fished out the two envelopes, which he politely offered to me. Then, having disposed of his employer's property, he returned to confront me, and, wrinkling his countenance into a most singular and highly corrugated smile, he opened his mouth and spoke. "So you have come, sir, the Doctor tells me, to take sanctuary for a time with us from the malice of your enemies."
"I don't know about that," I replied;" but there is a cockeyed transformationist who seems to be dodging about after me, and Dr. Thorndyke
