Virgil. Æneid, Book VI (translated by J. Conington). The Macmillan Company, New York, 1910.
Cicero. Scipio's Dream (translated by C. R. Edmonds in the Bohn Library Cicero). The Macmillan Company, New York.
Bede. The Vision of Dryhthelm (in Cook and Tinker's "Old English Prose," p. 58). Ginn and Company, Boston, 1908.
Dante. The Divine Comedy (translated by C. E. Norton). Houghton Mifflin Company, Boston, 1893.
The Pearl (translated by S. Jewett). Thomas Y. Crowell Company, New York, 1908.
For critical studies of the vision and for exhaustive bibliographies of the subject, see
Apocalypse. Encyclopædia Britannica.
Wright, T. Saint Patrick's Purgatory. London, 1844.
Krapp, G. P. The Legend of Saint Patrick's Purgatory. John Murphy Company, Baltimore, 1900.