PROLOGUS GALEATUS ("Helmeted Preface "): The name given by Jerome himself to the first published and most celebrated of his prefaces, that prefixed to his translation of the Books of Samuel and Kings. The preface is important as setting forth the principles adopted by Jerome in his translations from the Hebrew. It contains also a brief general introduction to the Old Testament, describes the contents of the three parts of the Palestinian canon, remarks upon the origin of the Hebrew alphabet, and makes a defense of his translations against the "mad dogs who bark and rage" against him. An English translation is given in NPNF, 2 ser., vi. 489-490.