"Mr. Hudson's remarks on color and expression of eyes in man and animals are reserved for a second chapter, 'Concerning Eyes.' He is eloquent upon the pleasures afforded by 'Bird Music in South America,' and relates some romantic tales of white men in captivity to savages. But it makes very little difference what is the topic when Mr. Hudson writes. He calls up bright images of things unseen, and is a thoroughly agreeable companion."--_Philadelphia Ledger_. _THE NATURALIST IN LA PLATA._ By W. H. Hudson, C. M. Z. S., author of "Idle Days in Patagonia," and joint author of "Argentine Ornithology." With 27 Illustrations. 8vo. Cloth, $4.00. "Mr. Hudson is not only a clever naturalist, but he possesses the rare gift of interesting his readers in whatever attracts him, and of being dissatisfied with mere observation unless it enables him to philosophize as well. With his lucid accounts of bird, beast, and insect, no one will fail to be delighted."--_London Academy_. "A notably clear and interesting account of scientific observation and research. Mr. Hudson has a keen eye for the phenomena with which the naturalist is concerned, and a lucid and delightful way of writing about them, so that any reader may be charmed by the narrative and the reflections here set forth. It is easy to follow him, and we get our information agreeably as he conducts us over the desert pampas, and makes us acquainted with the results of his studies of animals, insects, and birds."--_New York Sun_. _THE NATURALIST ON THE RIVER AMAZONS._ By Henry Walter Bates, F. R. S., late Assistant Secretary of the Royal Geographical Society. With a Memoir of the Author, by Edward Clodd. With Map and numerous Illustrations. 8vo. Cloth, $5.00. "This famous work is a natural history classic."--_London Literary World_. "More than thirty years have passed since the first appearance of 'The Naturalist on the River Amazons,' which Darwin unhesitatingly pronounced the best book on natural history which ever appeared in England. The work still retains its prime interest, and in rereading it one can not but be impressed by the way in which the prophetic theories, disputed and ridiculed at the time, have since been accepted. Such is the common experience of those who keep a few paces in advance of their generation. Bates was a 'born' naturalist."--_Philadelphia Ledger_. "No man was better prepared or gave himself up more thoroughly to the task of studying an almost unknown fauna, or showed a zeal more indefatigable in prosecuting his researches, than Bates. As a collector alone his reputation would be second to none, but there is a great deal more than sheer industry to be cited. The naturalist of the Amazons is, par excellence, possessed of a happy literary style. He is always clear and distinct. He tells of the wonders of tropical growth so that you can understand them all."--_New York Times_.