More than four hundred books, pamphlets, scientific reports, and magazine articles have been published by different writers, besides innumerable newspaper contributions, about Kentucky’s great cavern. Copies of most of these are in the author’s library. Yet there is a demand, and there seems to be room, for such a practical, condensed, and up-to-date hand-book as is now offered. It does not claim to tell all that might be told; and it omits much material that might interest the historian or the scientist. Its design is to aid the average visitor as he follows the four regulation routes by which the Cave is ordinarily exhibited. Those who covet more abundant information as to places not often visited, or concerning the cavern fauna and flora, or as to details of local history, or as to Mammoth Cave bibliography, are referred to the larger Illustrated Manual of Mammoth Cave, by Hovey and Call, published by John P. Morton and Company, and for sale at the Cave. My still more comprehensive work on “Celebrated American Caverns,” now out of print, may be found on the shelves of most public libraries. The revised Guide Map (1907 and 1909) in this volume, and for sale (on a larger scale) at the Cave hotel, was made by me from an original partial survey, earlier charts being consulted, especially those by Stephen Bishop and Dr. C. R. Blackall, with a few corrections and additions suggested by Mr. Max Kaemper, to whom thanks are also due for important facts concerning his discoveries in 1908. The route-sketches found in this hand-book were redrawn from those made by him. Acknowledgments are likewise due to my son, Dr. E. O. Hovey, of New York City; to my former comrade in cave-hunting, Dr. R. Ellsworth Call; to Benj. F. Einbigler, Norman A. Parrish, and others, for valuable correspondence and memoranda; to the late Mr. Ben Hains and Mr. H. M. Pinson, photographers; to Mr. H. C. Ganter for use of copyrighted cuts; to the officials of the Louisville and Nashville Railroad for additional illustrative material, as well as for other courtesies and favors; and particularly to the trustees, managers, and guides of Mammoth Cave for heartily and generously facilitating explorations in former and more recent years, without which this work would have been impossible. Finally, for information as to trains via the Louisville and Nashville Railroad and connections at Glasgow Junction with the Mammoth Cave Railroad; for the arrival and departure of steamboats on Green River; for terms of Cave routes and guides, and for hotel rates by the day or the week, and for other details not within the scope of this hand-book, application may be made to the Mammoth Cave Manager, at Mammoth Cave, Kentucky. Our simple aim is to aid and entertain the reader in his subterranean rambles. Horace C. Hovey. Newburyport, Mass. The Mammoth Cave OF KENTUCKY