The footman had got up by the chauffeur, and the big Napier car bubbled and whirred to itself a moment, and then slid noiselessly off, with rapid but smooth acceleration of its pace, over the dry street. It was checked for a moment at the corner into Piccadilly, poised like a hovering hawk, and then glided into the street. The road-way was very full, but, dancing elastically on its springs, it flicked in and out of the congested traffic with the precision of a fish steering its way between clumps of waving water-weed. It seemed, indeed, more like a sentient animal, a fine-mouthed horse, or some trained setter, than a machine, or as if intelligence and discernment, a brain that thought and calculated and obeyed, lived in that long painted bonnet, rather than merely pistons and cylinders and all the crack-named apparatus of its mechanism. It slackened its speed before one would have thought that any block in the traffic ahead was discernible, as if scenting the need from far off; it cut in and out of moving cabs and omnibuses, as if possessed of occult knowledge with regard to the pace they were going, and what lay invisible ahead of them; it foresaw impediments to its free movement that seemed as if they could not be foreseen, and conjectured openings that appeared inconjecturable. But all down Piccadilly, all down Knightsbridge, Thurso seemed unaccountably nervous. He could hardly sit still, but kept shifting and fidgeting in his seat, frowning and starting and grasping the side of the car, and once even calling out to the chauffeur, who, in fact, was one in a thousand for combined carefulness and speed, bidding him go more quietly through the jostle of traffic. This, again, was quite unlike him, though like what he had been for the last ten days, and his wife, seeming not to watch, watched him narrowly, but without comment. But when it came to his calling a warning to the inimitable Marcel, who would sooner have flayed all the skin off his own hands than let another vehicle scrape one grain of paint off the splash-board of his beloved car, she could not help protesting. Besides, it looked so silly to jump about like that. "Dear Thurso," she said, "what is the matter? He is driving perfectly carefully." Thurso frowned, still looking anxiously at the road in front, and spoke with unveiled irritation. "He is driving recklessly, it seems to me," he said. "As if it mattered whether we saved five minutes on the road. But women are never content till they've had some smash. That was simply the result of wanting to get in front of a cab now, instead of waiting two seconds."