Continuing the paperback edition of Charles S. Singleton's translation of 'The Divine Comedy,' this work provides the English-speaking reader with everything he needs to read and understand the 'Purgatorio.' Designed to accompany the prose translation of Giorgio Petrocchi's Italian text, this book is a masterpiece of erudition, offering a wide range of information on such subjects as Dante's vocabulary, his characters, and the historical sources of incidence in the poem. Professor Singleton provides a clear and profound analysis of the poem's basic allegory, and the illustrations, diagrams, and map clarify points that have previously confused readers of 'The Divine Comedy.'