It was one of those abnormally springlike days that New York sometimes experiences at the latter end of March, days when negligee shirts and last summer's straw hats make a sporadic appearance, and bucolic weather prophets write letters to the afternoon papers abusing the sun-spots. Really, it was hot, and I was anxious to get out of the dust and glare; it would be cool at the club, and I intended dining there. The time was half-past six, the height of the homeward rush hours, and, as usual, there was a jam of vehicles and pedestrians at the Fourth Avenue and Twenty-third Street crossing. The subway contractors were still at work here, and the available street space was choked with their stagings and temporary footwalks. The inevitable consequent was congestion; here were two of the principal thoroughfares of the city crossing each other at right angles, and with hardly enough room, at the point of intersection, for the traffic of one.