Digges. I. Leonard, an English mathematician, born in the parish of Barham, Kent, died about 1574. He was educated at Oxford, possessed an ample fortune, and devoted himself to mathematical studies. He wrote "Tectoni-cum, briefly showing the exact Measuring and speedy Reckoning of all manner of Lands, Squares, Timber, Stones, Steeples, etc." (1556); Pantometria, a practical geometrical treatise (1501); and "Prognostication Everlasting of right good effect, or Choice Rules to judge the Weather by the Sun, Moon, and Stars" (1555). II. Thomas, son of the preceding, died in 1595. He graduated at Oxford, adopted the profession of a soldier, and was appointed muster-master general of the forces sent out by Elizabeth to assist the Netherlands. He wrote several mathematical treatises and other works, among which are: Aloe, sen Scaloe Mathematical (1573); "A Letter on Parallax " (1573); and "A Perfect Description of the Celestial Orbs according to the most ancient Doctrine of the Pythagoreans" (1592).