The Fourth Book comprises an account of the Life and Rule of St. Benedict, and properly opens the history which Montalembert proposes to narrate. It presents a sufficiently minute sketch of the personal history of Benedict and his immediate followers; but its chief merit is in its very ample and satisfactory exposition of the Benedictine Rule. The next book traces the history of monastic institutions in Italy and Spain during the sixth and seventh centuries, and includes biographical notices of Cassiodorus, the founder of the once famous monastery of Viviers in Calabria, of St. Gregory the Great, of Leander, Bishop of Seville, and his brother Isidore, of Ildefonso of Toledo, and of many others of scarcely less renown in the early monastic records. The Sixth Book is devoted to the monks under the first Merovingians, and is divided into five sections, treating respectively of the conquest of Gaul by the Franks, of the arrival of St. Maur in Anjou and the propagation of the Benedictine rule there, of the relations previously existing between the monks and the Merovingians, of St. Radegund and her followers, and of the services of the monks in clearing the forests and opening the way for the advance of civilization. The Seventh Book records the life of St. Columbanus, and describes at much length his labors in Gaul, as well as those of his disciples, both in the great monastery of Luxeuil and in the numerous colonies which issued from it and spread over the whole neighborhood, bringing the narrative down to the close of the seventh century. At this point the portion of Montalembert's work now published terminates, leaving, we presume, several additional volumes to follow. For their appearance we shall look with much interest. If the remainder is executed in the same spirit as the portion now before us, and is marked by the same diligent study of the original authorities and the same persuasive eloquence, it will form one of the most valuable of the many attractive monographs which we owe to the French historians of our time, and will be read with equal interest by Catholics and Protestants. _Eighty Years' Progress of the United States, showing the Various Channels of Industry and Education through which the People of the United States have arisen from a British Colony to their Present National Importance_. Illustrated with over Two Hundred Engravings. New York: 51 John Street. Worcester: L. Stebbins. Two Volumes. 8vo.