My great object in the present work is to prove to society the practical truth of Mr. Livingston's theoretical statement: that the cheapest and most efficacious way of dealing with the "Dangerous Classes" of large cities, is not to punish them, but to prevent their growth; to so throw the influences of education and discipline and religion about the abandoned and destitute youth of our large towns, to change their material circumstances, and draw them under the influence of the moral and fortunate classes, that they shall grow up as useful producers and members of society, able and inclined to aid it in its progress. In the view of this book, the class of a large city most dangerous to its property, its morals and its political life, are the ignorant, destitute, untrained, and abandoned youth: the outcast street-children grown up to be voters, to be the implements of demagogues, the "feeders" of the criminals, and the sources of domestic outbreaks and violations of law. The various chapters of this work contain a detailed account of the constituents of this class in New York, and of the twenty years' labors of the writer, and many men and women, to purify and elevate it; what the principles were of the work, what its fruits, what its success. So much interest at home and abroad has been manifested in these extended charities, and so many inquiries are received continually about them, that it seemed at length time to give a simple record of them, and of the evils they have sought to cure. If the narrative shall lead the citizens of other large towns to inaugurate comprehensive and organized movements for the improvement of their "Dangerous Classes," my object will be fully attained. I have the hope, too, that these little stories of the lot of the poor in cities, and the incidents related of their trials and temptations, may bring the two ends of society nearer together in human sympathy. The discussion of the Causes of Juvenile Crime contained in this work must aid others who would found similar reformatory and preventive movements, to base them on principles and motives which should reach similar profound and threatening evils. CHARLES LORING BRACE. 19 EAST 4TH STREET, NEW YORK. June 1, 1872. CONTENTS OF CHAPTERS. ----- CHAPTER I. CHRIST IN CHARITY AND REFORM, AND CONDITION OF NEGLECTED CHILDREN BEFORE CHRISTIANITY.