The accounts given of Lionardo da Vinci by Vasari, Lomazzo, and the older writers, were repeated by Dufresne, De Piles, Felibien, and others. The more recent and accurate researches of Amoretti, prefixed to Lionardo’s Trattato della Pittura, in the thirty-third volume of the “Classici Italiani;” of Bossi, “Del Cenacolo di Lionardo da Vinci;” and of Venturi, “Essai sur les Ouvrages Physico-Mathématiques de Léonard da Vinci, avec des fragmens tirés de ses manuscrits apportés de l’Italie;” may be consulted for further particulars respecting the life and works of this great man. [Illustration: [Group from the Battle of the Standard.] ] [Illustration: _Engraved by W. T. Fry._ VAUBAN. _From an original Picture by Lebrun in the War Office at Paris._ Under the Superintendance of the Society for the Diffusion of Useful Knowledge. _London. Published by Charles Knight, Ludgate Street._ ] [Illustration] VAUBAN. Sebastien le Prestre de Vauban, son of Albin le Prestre and Aimée Carmagnol, was born May 1, or, by other accounts, May 15, 1633, at St. Leger-de-Foucheret, a small village between Saulieu and Avallon, in the province of Burgundy. He became an orphan at an early age, his father having lost both his life and fortune in the public service. Under the protection and instruction of M. de Fontaines, prior of St. John at Semur, he acquired some knowledge of geometry, a science then but little cultivated among military men. At seventeen years of age he deserted his home, and entered as a volunteer in the regiment of Condé, then employed in the Spanish service, in which his zeal and abilities soon procured him a commission. Nor was it long before he showed his talent for the science of engineering. In 1652 he was employed in the erection of the fortifications of Clermont, in Lorraine; and the same year, serving at the first siege of S^{te.} Menehould, he made several lodgments, and during the assault swam the river under the enemy’s fire. Public notice was taken of this exploit; and by this means Vauban’s family heard, for the first time, that he had embraced the military profession. In 1653 he was taken prisoner by a French corps, and conducted to Cardinal Mazarin, who thought it worth while to purchase his services with a lieutenancy in the regiment of Bourgogne. In the same year he served as an engineer under the Chevalier de Clerville, at the second siege of S^{te.} Menehould; and the charge of repairing the fortifications of that town, when retaken by the troops of Louis XIV., was confided to him.