“But what occurred to you?” I asked, all anxiety to learn the reason of his long silence.

“Well,” he said, finishing his brandy at one gulp; “it happened like this. When I left you I came up to town and started to keep observation on that newsagent’s in Sterndale Road. The job was a terrible wearying one, but I was rewarded on the third evening by seeing the man you described—tall, fair, and freckled—call for a letter. Unobserved by him. I followed him home to St. Peter’s Square, Hammersmith. Then I resolved to exercise a strict vigil over that house in order to find out all about its inmates. During the following day I discovered that Purvis was a bachelor of means and was very often in the habit of receiving visits from men of rather shady character. By constant watchfulness I came to know by sight all these men, five in number, including one named Bennett.”

“Bennett?” I interrupted. “I wonder if he’s Black Bennett?”

“Don’t know,” was my friend’s rejoinder. “I can only tell you that they are as fine specimens of rascally adventurers as can be found at this moment in London. Purvis, being a good billiard player, often spends his evenings at the Crown, in Hammersmith Broadway, playing sometimes with Bennett and sometimes with one or other of his companions. Having obtained this piece of knowledge from observation, I took a bedroom at the Crown, in order that I might be able to saunter into the billiard-room at odd hours. As you know, I can play a fair game, and my object was to get into touch with Purvis by playing with him.

“I had not long to wait, for one evening he was there alone, and having made some casual remarks he invited me to play. From the first he seemed somewhat surprised to find that my form was slightly better than his, and before long I saw from his play that he was used to the ruses of sharks and thieves. He seemed to me to be rather well educated, the kind of man whose exterior was that of a gentleman, but who lives by his wits. He offered to bet me a sovereign on the game, and, in order to content him, I agreed. Very quickly the game was entirely in my hands, but so that he might become friendly I allowed him to win and paid him the sovereign.

“Bennett came in hurriedly just than and whispered something in an undertone, whereupon Purvis excused himself from playing further, put on his coat, and followed his friend out. That mysterious message aroused my curiosity; therefore as soon as the door was closed I threw on my coat and slipped out just in time to see the pair enter a hansom. They drove away and I drove after them, at a respectable distance, in order that they should not detect my vigilance.

“We drove for more than half an hour through Shepherd’s Bush and Kensal Green, until we entered the Edgware Road, near Kilburn Station, and, crossing it, Purvis and Bennett alighted before a house in a dark side-street. When they had disappeared inside I dismissed my own cab and took a good look at the exterior of the place. It was a semi-detached house of rather neglected appearance, approached by a small strip of garden lying behind the iron railings. The place was in total darkness, however—not even a light over the front door. They had entered so quickly that I believe they must have used a latch-key.

“Half-a-dozen times I passed and repassed the dark silent place, wondering what was the object of their journey there, until, the blinds being up and the front rooms all being unlit, it occurred to me that whatever was taking place was at the rear of the premises. So, resolving to try and ascertain for myself the reason of the hurried visit, I entered the little garden and crept silently round to the back, where in a room on the first floor was a light, and even from where I stood I could hear men’s voices. I saw that the yellow holland blind, having been pulled down violently, had given way from the roller, and a piece hung down. This would afford me a view of the room if only I could climb high enough. Now, beneath the window in question was a lean-to conservatory, built out from what was, I supposed, the drawing-room, but upon the roof of such a fragile structure I dared not venture. I noticed some iron piping going straight up, and, aided by the wooden lattice on the wall, it occurred to me that I might safely accomplish the feat. As you know, I am rather fond of climbing; therefore I quickly took off my boots and commenced to work my way up towards the coign of vantage.

“To reach a level high enough, however, was a task much more difficult than I had at first anticipated, especially as the creeper-covered lattice work, being old and rotten, gave way almost each time I grasped it. At last, however, swinging myself over, I succeeded in clutching what seemed like a safe piece of trellis close to the spot that afforded a view into the room. Just at that very moment, when my eyes came to the window where hung the corner of the blind untacked from its roller, a loud scream issued forth—the agonized cry of a woman.

“Clinging with hands and feet to the insecure woodwork I craned my neck until I could get a view of the interior of the room. The sight that greeted me was one that I was certainly unprepared for. The apartment was a back parlour, fairly well furnished. Within stood Purvis, Bennett, and two other men whom I recognized as constant visitors to St. Peter’s Square. The door was open, and one of the men stood holding by the arm a young, well-dressed woman. She had evidently been dragged in there against her will, for she had covered her pale face with her hand to shut out from her eyes the terrible object she had been brought there to see—the corpse of a young man.”