"But," said Seth, "I want to go where the lady and gentleman who have just passed through have gone." "To the stalls?" inquired the gentleman in the white tie, in a tone of surprise. "Yes, to the stalls," replied Seth. "Can't admit you," was the rejoinder. "Why?" "Not dressed." Seth glanced at his common clothes, and with a slight shrug and a little ironical smile, pardonable under the circumstances, took the indicated direction to the pit and gallery. He paid for admission to the pit, and, soon after he entered, succeeded in discovering where the Duchess was seated. She was in the stalls with her companion, and their backs were towards him. When Seth entered the pit, he found it very full, and he could only obtain standing room; necessarily, therefore, his discovery of the Duchess was made with some difficulty, and from where he stood it was impossible for him to observe her closely. Indeed, from the surging of the audience, and the goings to and fro, she was often not visible to him. He had no heart for the performance, which caused a running fire of laughter and merriment in all parts of the theatre, and before its termination he left the place, afraid lest in the last crush he should miss the Duchess. He lingered patiently in the Strand, near the box entrance of the theatre, until the people came out, and was successful in catching sight of the Duchess and her companion, whose evening dress was covered by a light overcoat. When they had disengaged themselves from the throng, they paused, and from the opposite side of the street Seth noted that a discussion was taking place between them, the man persuading, the Duchess refusing. At length the Duchess cut short the disputed point by running away from her companion with a light laugh. He hastened immediately after her, and arm-in-arm they wended their way to Rosemary Lane, followed warily by Seth. There they parted, after more than one kiss, which caused Seth to knit his brows ominously. When he was alone, the man took from his pocket a cigar case, which, notwithstanding the distance that separated them, Seth observed was made of silver. Lighting a cigar, the Duchess's lover strolled leisurely along until he came to a cab-rank, whence he hailed a cab. This was what Seth feared. Quickly hailing another, he gave the driver instructions to follow, without laying himself open to observation, promising extra payment if this were done. His cab pulled up in one of the most fashionable quarters of the west of London. As he was paying the fare, he asked the driver the name of the street, and saw his girl's lover walk on a few yards, and pause at a great house, which he presently entered. Then Seth walked up the steps, and noted the number.