It is plain that although almost all of the characters of the poem are precluded from making allusion to the events of human history, the poet himself is free; and he uses his freedom throughout. Most of the passages that have gained for Milton the name of a learned poet are introduced by way of simile. At times he employs the simplest epic figure, drawn from the habits of rustic or animal life. But his favourite figure is the "long-tailed simile," or, as it is better called, the decorative comparison, used for its ennobling, rather than for its elucidating virtue. Here he parts company with Homer, and even with Virgil, who could draw on no such vast and various store of history, geography, and romance. From Herodotus to Olaus Magnus, and onward to the latest discoveries in geography and astronomy, the researches of Galileo, and the descriptions given by contemporary travellers of China and the Chinese, or of the North American Indians, Milton compels the authors he had read, both ancient and modern, to contribute to the gracing of his work. It is partly this wealth of implicit lore, still more, perhaps, the subtly reminiscent character of much of his diction, that justifies Mr. Pattison in the remark that "an appreciation of Milton is the last reward of consummated scholarship." A third device, not the least remarkable of those by which he gives elasticity to his theme, is to be found in the tradition that he adopts with regard to the later history of the fallen angels. A misunderstanding of four verses in the fourteenth chapter of Isaiah, and some cryptic allusions in the Book of Revelations are the chief Scriptural authorities for the Miltonic account of the Fall of the Angels, which is not borrowed from the Fathers, but corresponds rather with the later version popularised in England by the cycles of Miracle Plays. According to the _Divine Institutes_ of Lactantius, the nameless Angel, to whom from the first had been given power over the new-created Earth, was alone infected with envy of the Son of God, his elder and superior, and set himself to vitiate and destroy mankind in the cradle. He tempted Eve, and she fell; after the expulsion from Paradise he set himself also to corrupt the guardian angels who were sent down from Heaven for the protection and education of the increasing race of men. In this attempt also he succeeded; "the sons of God saw the daughters of men that they were fair, and they took them wives of all which they chose." And they forgot their heavenly estate, and made for themselves a Godless dominion upon Earth. This is the Fall of the Angels as it is narrated at greater length in the recently recovered apocryphal _Book of Enoch_, and alluded to, perhaps in the Epistles of Peter and of Jude, where are mentioned "the angels that sinned," and "the angels which kept not their first estate." Milton's version brings these angels to the earth, not as protectors of mankind,