"The 160 drawings catalogued in this volume, all but one now in the Royal Library at Windsor Castle, are derived from the illustrations in three very famous - and two rather less famous - ancient manuscript books. Four of the books were (and still are) in the Vatican Library: the renowned Vatican Vergil, the so-called 'Roman' Vergil and the Vatican Terence, and the less well-known Palatine Agrimensores; the fifth was a book, now lost, known as the Chronography or Calendar of 354."--P. 17.