“Your room next to mine!” I said in concern, the thought that perhaps he might have overheard my interview with Frank that morning suddenly occurring to me.

“Well, there’s nothing to be alarmed at, is there? I’ve not escaped from quarantine. By the way, I took an opportunity of calling upon you this morning, and as you did not notice my timid rap—you know I always give a timid rap, for you’ve often laughed at it—I peeped in. You were, however, so deeply ingrossed in conversation with your friend Nugent that I did not think fit to disturb you, and came away. He’s an old friend of yours, isn’t he?” he asked, carelessly.

When Demetrius told me this my heart stood still; yet what was there to fear? I could have as well trusted him as Frank. Yet somehow the idea of Demetrius knowing about this was intensely disagreeable, especially after his ironical reference to the photograph, which had been uttered in a rather threatening tone.

Hastily muttering something about being sorry he had not come in as Bob was very good company, I looked at my watch and bade him an abrupt adieu. He seemed inclined to walk back with me, but seeing his intention I called a cab and bade the driver hurry to the hotel.

There is an indistinct recollection in my mind of having eaten a hasty dinner, but whether I really did so that eventful evening or not is a matter of speculation. At all events, I wrapped up warmly, for it was a wet night and the prospect was anything but inviting.

Determining to have a sharp walk in order to set my blood in circulation, I had started out, when it occurred to me that, having a good round sum in notes in my pocket, it would be policy to leave them behind. Hurrying back I did this, and turned out sundry valuables from my pocket-book. Then the seal, on its blood-stained and crumpled paper, became apparent in the depths of the wallet and the question arose, should I leave that also?

Since the night when it was given me by the trembling hands of the man whose room I was now about to invade, it had rested securely there, for I had been afraid to let it out of my possession on any account. It would perhaps be best to leave it at the hotel, under lock and key, so I put it in a little cash-box in my portmanteau. But the next moment a superstitious dread seized me, and I replaced it again in the pocket-book, and then once more started on my adventurous errand.

Before long I reached the spot. It was a rather tall house, uninhabited apparently, for its lower windows were covered with hoarding, and generally the structure bore a grim, uninviting appearance. On the first occasion, when the poor fellow had dragged me there in a kind of mad frenzy, I had not taken particular notice of the manner in which we effected our entrance, but, as there was no one about, I made a careful scrutiny of a side-door.

As I gave it a violent push the noise resounded through the empty place with such a hollow clamour that a chill fell upon my heart, and, save for the intense curiosity which possessed me, I should have come away, leaving the place unexplored.

But this was rendered impossible, for, although the moment had been carefully chosen when there was not a person in sight, my indecision, lasting for several minutes, brought other consequences in its train. The corner where the door was located was a dark one, it was true, yet, as the measured tread of a constable fell upon my strained ears, I saw immediate action was imperative. The prospect of a bull’s-eye lantern being suddenly flashed upon one was not at all encouraging, and was not to be faced.