"An exceedingly entertaining and informing book containing the latest information concerning the whole group of mammals, that branch of animal creation most interesting to man because he is one himself. There are numberless works on this topic or related ones, but we know of none that is so comprehensive as this in a single volume.... There is an amazing amount of information written simply but with authority. Every man, woman, and child who takes up this book will hate to put it down for a moment."--_Philadelphia Inquirer._ "There are pictures and anecdotes for the little ones of the family, adventures and curious habits to attract the eager minds of older lads, guiding information and suggestion for the student, and the whole is treated in the light of the latest facts. Many novelties, apart from the simple, homely, almost humorous method of handling a truly scientific subject, characterize the volume. Nowhere else is so intelligently traced the relation between the past (fossil history) and the present of the families in this most important of all animal tribes; nowhere else will be found explained many curious customs, such as the origin of the habit of storing winter food, how the opossum came to 'play 'possum,' and why beavers dam up streams. The book is written from the American point of view, yet the whole world is covered and the newest material has been utilized. It would be difficult to find a book on natural history which could make a stronger appeal to the reader, old or young, who is interested in natural history than this volume by Ernest Ingersoll."--_Brooklyn Daily Eagle._ "There is not a page of the whole volume but is full of interest, and the many splendid photographs of the existing and prehistoric mammals add greatly to the value of the book. One lays it down with reluctance and with the feeling that the author has added largely to the sum of human knowledge."--_Toronto Globe._ "A large and admirable book.... Interesting as fiction, scientifically exact, simply expressed, this well-prepared volume will almost literally repeople the earth for many readers. Those who already love natural history will rejoice in its fascinating richness of information, while it would be difficult to imagine a more readable and comprehensive introduction to the numerous big and little brethren of the woods and fields."--_Chicago Record-Herald._ PUBLISHED BY THE MACMILLAN COMPANY 64-66 Fifth Avenue, New York Lieut.-Col. J. H. Patterson's IN THE GRIP OF THE NYIKA _Illustrated Cloth 8vo $2.00 net_