☞_For a full List of Books suitable for Libraries, see_ HARPER & BROTHERS' TRADE-LIST _and_ CATALOGUE, _which may be had gratuitously on application to the Publishers personally, or by letter enclosing Five Cents._ ☞HARPER & BROTHERS _will send any of the following works by mail, postage prepaid, to any part of the United States, on receipt of the price._ MOTLEY'S DUTCH REPUBLIC. The Rise of the Dutch Republic. By JOHN LOTHROP MOTLEY, LL.D., D.C.L. With a Portrait of William of Orange. 3 vols., 8vo, Cloth, $10 50. MOTLEY'S UNITED NETHERLANDS. History of the United Netherlands: from the Death of William the Silent to the Twelve Years' Truce--1609. With a full View of the English-Dutch Struggle against Spain, and of the Origin and Destruction of the Spanish Armada. By JOHN LOTHROP MOTLEY, LL.D., D.C.L. Portraits. 4 vols., 8vo, Cloth, $14 00. NAPOLEON'S LIFE OF CÆSAR. The History of Julius Cæsar. By His Imperial Majesty NAPOLEON III. Two Volumes ready. Library Edition, 8vo, Cloth, $3 50 per vol. _Maps to Vols. I. and II. sold separately. Price $1 50 each, NET._ HAYDN'S DICTIONARY OF DATES, relating to all Ages and Nations. For Universal Reference. Edited by BENJAMIN VINCENT, Assistant Secretary and Keeper of the Library of the Royal Institution of Great Britain; and Revised for the Use of American Readers. 8vo, Cloth, $5 00; Sheep, $6 00. HARTWIG'S POLAR WORLD. The Polar World: a Popular Description of Man and Nature in the Arctic and Antarctic Regions of the Globe. By Dr. G. HARTWIG, Author of "The Sea and its Living Wonders," "The Harmonies of Nature," and "The Tropical World." With Additional Chapters and 163 Illustrations. 8vo, Cloth, Beveled Edges, $3 75. WALLACE'S MALAY ARCHIPELAGO. The Malay Archipelago: the Land of the Orang-Utan and the Bird of Paradise. A Narrative of Travel, 1854-1862. With Studies of Man and Nature. By ALFRED RUSSEL WALLACE. With Ten Maps and Fifty-one Elegant Illustrations. Crown 8vo, Cloth, $3 50. WHYMPER'S ALASKA. Travel and Adventure in the Territory of Alaska, formerly Russian America--now Ceded to the United States--and in various other parts of the North Pacific. By FREDERICK WHYMPER. With Map and Illustrations. Crown 8vo, Cloth, $2 50. ORTON'S ANDES AND THE AMAZON. The Andes and the Amazon; or, Across the Continent of South America. By JAMES ORTON, M.A., Professor of Natural History in Vassar College, Poughkeepsie, N.Y., and Corresponding Member of the Academy of Natural Sciences, Philadelphia. With a New Map of Equatorial America and numerous Illustrations. Crown 8vo, Cloth, $2 00.