The man paused in the bright portico, his patent-leather boots twinkling under the lamp's rays on that comfortable carpet. I waited, expecting him to whistle for a hansom. But he turned, gave an order to the butler, and stepping briskly down into the street, made off eastwards. The door closed behind him. He was the man I most hated in the world. If I had longed to cross the threshold a while back it was to seek him, and for no other reason. I started to follow him, my hands still in my pockets. The snow muffled our footfalls completely, for as yet the slight north-east wind had frozen but the thinnest crust of it. He was walking briskly, as men do in such weather, but with no appearance of hurry. At the corner of Sloane Street he halted under a lamp, pulled out his watch, consulted it, and lit a cigarette; then set off again up the street towards Knightsbridge. This halt of his had let me up within twenty paces of him. He never turned his head; but went on presenting me his back, a target not to be missed. Why not do it now? Better now and here than in a crowded thoroughfare. My right hand gripped the revolver more tightly. No, there was plenty of time: and I was curious to know what had brought Gervase out at this hour: why he had left his guests, or his wife's guests, to take care of themselves: why he chose to be trudging afoot through this infernally unpleasant snow. The roadway in Sloane Street was churned into a brown mass like chocolate, but the last 'bus had rolled home and left it to freeze in peace. Half-way up the street I saw Gervase meet and pass a policeman, and altered my own pace to a lagging walk. Even so, the fellow eyed me suspiciously as I went by--or so I thought: and guessing that he kept a watch on me, I dropped still further behind my man. But the lamps were bright at the end of the street, and I saw him turn to the right by the great drapery shop at the corner. Once past this corner I was able to put on a spurt. He crossed the roadway by the Albert Gate, and by the time he reached the Park railings the old distance separated us once more. Half-way up the slope he came to a halt, by the stone drinking-trough: and flattening myself against the railings, I saw him try the thin ice in the trough with his finger-tips, but in a hesitating way, as if his thoughts ran on something else and he scarcely knew what he did or why he did it. It must have been half a minute before he recovered himself with a shrug of his shoulders, and plunging both hands deep in his pockets, resumed his pace. As we passed Hyde Park Corner I glanced up at the clock there: the time was between a quarter and ten minutes to one. At the entrance of Down Street he turned aside again, and began to lead me a zigzag dance through the quiet thoroughfare: and I followed, still to the tune of the "Wiener Blut."