were craning their necks forward, or twitching them from side to side. Through the press foot-passengers found their way across the street, and imaginably in the dark that swallowed up the sidewalks, they were going and coming on errands that could brook no stay. The wonder was that they could know which way they were going, or how they could expect to reach any given point. Where the buildings were densest the fog was thinnest, and there it was a greenish-yellow, like water when you open your eyes and look at it far below the surface. Where the houses fell away, and you found yourself in a square, or with a park on one side, the vapor thickened into blackness and seemed to swell, a turbid tide, overhead and underfoot. It hurt your straining eyes, and got into your throat, and burned it like a sullen steam. If your cab stopped, miraculously enough, at the address given, you got out incredulous and fearful of abandonment. When you emerged again, and found your cab waiting, you mutely mounted to your place and resumed your strange quality of something in a dream. So, all that day the pall hung upon the town, and all the next. The third day the travellers were to sail from Liverpool, and there was some imperative last-shopping on the eve. Two of them took a courageous cab, and started for Bond Street. In a few moments the cab was in the thick of the fog and its consequences, a tangle of stationary vehicles with horses detached, or marking time, without advancing either way. A trembling hand lifted the little trap in the cab-roof, and a trembling voice asked the cabman: “Do you think you can go on?” “I think so, sir.” The horse's head had already vanished; now his haunches faded away. Towards the dashboard the shafts of another cab came yawing, and again the eager voice quavered: “Do you think you can get back?” “Oh yes, sir,” the answer came more cheerfully, and the shopping was done a week later in Twenty-third Street. There is an insensate wish in the human witness to have nature when she begins misbehaving do her worst. One longs to have her go all lengths, and this perhaps is why an earthquake, or a volcanic eruption, of violent type is so satisfactory to those it spares. It formed the secret joy of the great blizzard of 1888, and it must form the mystical delight of such a London fog as we had experienced. But you see the blizzard once in a generation or a century, while if you are good, or good enough to live in London, you may see a characteristic fog almost any year. It is another case in which the metropolis of the New World must yield to the metropolis of the whole world. Fog for fog, I do not say but the fog in which we left New York, on March 3, 1904, was not as perfect as our great London fog. But the New York fog was only blindingly white and the London fog blindingly black, and that is a main difference.