He never had to stand up in the cars, for he boarded them, whether at one end of his trip or the other, before they were crowded; but as soon as crowds began to fill up the aisles he always gave up his seat. This naturally gained him repeated credit for courtesy, but the real reason for his apparent gallantry was that he could not see people's faces when he was sitting while others stood in the aisles. But when he hung to a strap and looked at the window in front of him, the blackness outside combined with the bright light of the car to make the glass of the windows an excellent mirror to reflect the faces of those who stood near him. To classify faces according to nationality was not easy in the polyglot crowds of this East Side line. But Mr. Neal devised many schemes to help him. He watched the papers they read: everybody read papers! He even ventured when greatly curious, to ask a question of the object of his interest, so that the man might reveal his origin. Usually he was rebuffed, but sometimes he was successful. He read all the books on immigrants he could get his hands on. More than once he even followed a rare specimen--shadowed him to his work and there made guarded inquiries. Such investigations had several times made him late to work, so that his chief had made sarcastic remarks. The chief clerk at Fields, Jones & Houseman's was a tall, gaunt, old-young man with a hawk-like nose that carried eyeglasses perched perilously astride it, and he had a tongue that spit caustic. But the chief clerk's ugly words did not annoy Mr. Neal if his inquiry had been successful. At length he became so skillful that he could separate the Slavic types into their various nationalities, and he could tell Polish, Lithuanian and Roumanian Jews apart. He could name the provinces from which Italians and Germans came with few errors. But the most interesting set of categories, according to which he filed away the various faces he saw was that of their ruling passions. There was the scholar, the sport, the miser, the courtesan, the little shopkeeper, the clerk, the housewife, the artist, the brute, the hypocrite, the clergyman, the bar-hound, the gambler. The charm of this classification was that the categories were not mutually exclusive, and permitted infinite variation. Mr. Neal became as devoted to this fascinating game as ever any enthusiast has been to billiards, golf, baseball or poker. He looked forward all day, while in the midst of the ancient grind of Fields, Jones & Houseman, to the moment when he could establish himself in a position of vantage on a subway car, and get back to his study of faces. All night long he dreamed of faces--faces wise and foolish, good and evil.