Facsimile of a Leaf from the Diary of Daniel Osborn _On pages_ 344, 345 MAPS Map of the Underground Railroad System _Facing page_ 113 Map of Underground Lines in Southeastern Pennsylvania " 113 Map of Underground Lines in Morgan County, Ohio _On page_ 136 Lewis Falley's Map of the Underground Routes of Indiana and Michigan _On page_ 138 Map of an Underground Line through Livingston and La Salle Counties, Illinois _On page_ 139 Map of Underground Lines through Greene, Warren and Clinton Counties, Ohio _On page_ 140 APPENDICES PAGES APPENDIX A: Constitutional Provisions and National Acts relative to Fugitive Slaves, 1787-1850 359-366 APPENDIX B: List of Important Fugitive Slave Cases 367-377 APPENDIX C: Figures from the United States Census Reports relating to Fugitive Slaves 378, 379 APPENDIX D: Bibliography 380-402 APPENDIX E: Directory of the names of Underground Railroad Operators and Members of Vigilance Committees 403-439 PREFACE This volume is the outgrowth of an investigation begun in 1892-1893, when the writer was giving a portion of his time to the teaching of United States history in the Ohio State University. The search for materials was carried on at intervals during several years until the mass of information, written and printed, was deemed sufficient to be subjected to the processes of analysis and generalization. Patience and care have been required to overcome the difficulties attaching to a subject that was in an extraordinary sense a hidden one; and the author has constantly tried to observe those well-known dicta of the historian; namely, to be content with the materials discovered without making additions of his own, and to let his conclusions be defined by the facts, rather than seek to cast these "in the mould of his hypothesis."