FRONTINUS, SEXTUS IULIUS (c. A.D. Roman soldier and author. In 7o he was city praetor, and five years later succeeded Petilius Cerealis as governor of Britain. He subdued the Silures, and held the other native tribes in check till he was superseded by Agricola (78). In 97 he was appointed superintendent of the aqueducts (curator aquarum) at Rome. His chief work is De aquis urbis Romae, in two books, containing a history and description of the water-supply of Rome, including the laws relating to its use and maintenance, and other matters of importance in the history of architecture. His treatise De re militari is lost. His Strategematicon libri iii. is a collection of examples of military stratagems from Greek and Roman history ; a fourth book, the plan and style of which is different from the rest (more stress is laid on the moral aspects of war, e.g., disci pline), is the work of another writer (best edition by G. Gunder mann, 1888) . Extracts from a treatise on land-surveying ascribed to Frontinus are preserved in Lachmann's Gromatici veteres A valuable edition of the De aquis (text and translation) has been published by C. Herschel (Boston, Mass., 1899; 2nd ed., 1913). It contains illustrations, maps, a photographic reproduction of the only ms. (the Monte Cassino), explanatory chapters, and bibliography, in which special reference is made to P. de Tissot, Etude sur la condition des agrimensores (1879). Editions of the works: A. Dederich Knohn (Leipzig, 1922) ; the Strategematica by R. Scott (1816) ; Strategemata and De aquis by C. Bennett (Loeb series, 1925) .