Amid all the din and turmoil of fashion and folly seeking its own in the great English capital at the midnight hour, a certain corner of an exclusively fashionable quarter seemed strangely quiet and sequestered, and this was the back of one of the row of palace-like dwellings known as Carlton House Terrace. Occasionally a silent-wheeled hansom, brougham, or flashing motor-car sped swiftly along the Mall, towards which the wide stone balcony of the house projected,--or the heavy footsteps of a policeman walking on his beat crunched the gravel of the path beneath, but the general atmosphere of the place was expressive of solitude and even of gloom. The imposing evidences of great wealth, written in bold headlines on the massive square architecture of the whole block of huge mansions, only intensified the austere sombreness of their appearance, and the fringe of sad-looking trees edging the road below sent a faint waving shadow in the lamplight against the cold walls, as though some shuddering consciousness of happier woodland scenes had suddenly moved them to a vain regret. The haze of heat lay very thickly here, creeping along with slow stealth like a sluggish stream, and a suffocating odour suggestive of some subtle anaesthetic weighed the air with a sense of nausea and depression. It was difficult to realise that this condition of climate was actually summer in its prime--summer with all its glowing abundance of flower and foliage as seen in fresh green lanes and country dells,--rather did it seem a dull nightmare of what summer might be in a prison among criminals undergoing punishment. The house with the wide stone balcony looked particularly prison-like, even more so than some of its neighbours, perhaps because the greater number of its many windows were shuttered close, and showed no sign of life behind their impenetrable blackness. The only strong gleam of light radiating from the inner darkness to the outer, streamed across the balcony itself, which by means of two glass doors opened directly from the room behind it. Here two men sat, or rather half reclined in easy-cushioned lounge chairs, their faces turned towards the Mall, so that the illumination from the apartment in the background created a Rembrandt-like effect in partially concealing the expression of the one from the other's observation. Outwardly, and at a first causal glance, there was nothing very remarkable about either of them. One was old; the other more than middle-aged. Both were in evening-dress,--both smoked idly, and apparently not so much for the pleasure of smoking as for lack of something better to do, and both seemed self-centred and absorbed in thought. They had been conversing for some time, but now silence had fallen between them, and neither seemed disposed to break the heavy spell. The distant roar of constant traffic in the busy thoroughfares of the metropolis sounded in their ears like muffled thunder, while every now and again the soft sudden