We have more than once recorded in the Messenger the high pleasure afforded us by the pages of Lieutenant Slidell. The “_Year in Spain_” with the exception of its third volume, is no novelty, we are sure. Its well-limned natural scenery—its exceedingly happy groups of banditti, and boleros, and mouse-colored asses, and muleteers, and modern Sancho Panzas, and Sangrados, and primitive Alcaldes, and pallazzos, and plazas, and posadas, are still passing before the eyes of a great majority of our readers in a Kaleidescopal freshness and variety, unimpaired, and unimpairable. It would hardly be worth our while then to tell the public what the public know quite as well as ourselves—that the book has a vigorous interest—has received a great deal of commendation—and deserves it. The third volume in the present edition is superadded to the English _imprimatur_, and embodies what we consider the most effective portion of the narrative—an account of the author's visit to Grenada. The mechanical execution of the book is honorable to the Messieurs Harpers. The vignettes in each of the volumes, are particularly good. We would sincerely recommend our friends to procure a copy of the work forthwith—to give it a niche in their libraries—and to remember that it may safely be referred to upon occasion, as a most creditable specimen of American talent. ADVENTURES IN SEARCH OF A HORSE. _The Adventures of a Gentleman in Search of a Horse. By Caveat Emptor, Gent. One, Etc. Philadelphia: Republished by Carey, Lea and Blanchard._ This book, to say nothing of its peculiar excellence and general usefulness, is remarkable as being an anomaly in the literary way. The first 180 pages are occupied with what the title implies, the adventures of a gentleman in search of a horse—the remaining 100 embrace, in all its details, difficulties, and intricacies, a profound treatise on the English _law of horse-dealing warranty!_—and this too, strange as it may seem, appears to be the first and only treatise upon a subject so interesting to a great portion of the English gentry. Think of _law_, serviceable law too, intended as a matter of reference, compiled by a well known attorney, and dedicated to Sir John Gurney, one of the Barons of his Majesty's Court of Exchequer—think of all this done up in a green muslin cover, and illustrated by very laughable wood-cuts. Only imagine the stare of old Coke, and of the other big wigged tribe in white calf and red-letter binding, as our friend in the green habit shall take his station by their side upon the book shelf! The _adventurous_ portion of the book is all to which we have attended, and so far we have found much fine humor, good advice, and useful information in all matters touching the nature, the management, and especially the purchase of a horse. We would advise all amateurs to look well, and look quickly into the pages of Caveat Emptor. LAFITTE.