The kindergarten period lasted until Billy was ten; then he commenced "swiping" brass faucets from vacant buildings and selling them to a fence who ran a junkshop on Lincoln Street near Kinzie.From this man he obtained the hint that graduated him to a higher grade, so that at twelve he was robbing freight cars in the yards along Kinzie Street, and it was about this same time that he commenced to find pleasure in the feel of his fist against the jaw of a fellow-man.He had had his boyish scraps with his fellows off and on ever since he could remember; but his first real fight came when he was twelve. He had had an altercation with an erstwhile pal over the division of the returns from some freight-car booty. The gang was all present, and as words quickly gave place to blows, as they have a habit of doing in certain sections of the West Side, the men and boys formed a rough ring about the contestants.The battle was a long one. The two were rolling about in the dust of the alley quite as often as they were upon their feet exchanging blows. There was nothing fair, nor decent, nor scientific about their methods. They gouged and bit and tore. They used knees and elbows and feet, and but for the timely presence of a brickbat beneath his fingers at the psychological moment Billy Byrne would have gone down to humiliating defeat. As it was the other boy went down, and for a week Billy remained hidden by one of the gang pending the report from the hospital.When word came that the patient would live, Billy felt an immense load lifted from his shoulders, for he dreaded arrest and experience with the law that he had learned from childhood to deride and hate. Of course there was the loss of prestige that would naturally have accrued to him could he have been pointed out as the "guy that croaked Sheehan"; but there is always a fly in the ointment, and Billy only sighed and came out of his temporary retirement.That battle started Billy to thinking, and the result of that mental activity was a determination to learn to handle his mitts scientifically-people of the West Side do not have hands; they are equipped by Nature with mitts and dukes. A few have paws and flippers.He had no opportunity to realize his new dream for several years; but when he was about seventeen a neighbor's son surprised his little world by suddenly developing from an unknown teamster into a locally famous light-weight.The young man never had been affiliated with the gang, as his escutcheon was defiled with a record of steady employment. So Billy had known nothing of the sparring lessons his young neighbor had taken, or of the work he had done at the down-town gymnasium of Larry Hilmore.Now it happened that while the new light-weight was unknown to the charmed circle of the gang, Billy knew him fairly well by reason of the proximity of their respective parental back yards, and so when the glamour of pugilistic success haloed the young man Billy lost no time in basking in the light of reflected glory.