Note 63.1 — The Evolution of Religion

For the Greek origin of the Christian apocalyptical literature, vide Dieterich, Beitrage zur Erklärung der neu-entdeckten Petrus Apokalypse, Leipzig, 1893. The clearest trace of Orphic influence on historic Christianity is the doctrine of purgatory, which was popularised for the later ages by Vergil’s VIth Æneid: vide especially the purgatorial theory in Servius’ Commentary, Æn. vi. 741.