[317.] the sad humour, the heavy moisture, or "slombring deaw."
[318.] morpheus, the son of Somnus and god of sleep and dreams, who sprinkled the dew of sleep on the brow of mortals from his horn or wings or from a bough dipped in Lethe.
[323.] His Magick bookes and artes. Monks engaged in scientific investigation, such as Friar Roger Bacon, were popularly supposed to use cabalistic books, and to make compacts with the Devil by means of necromancy, or the black art, as in st. xxxvii. Before the close of the century Marlowe's Doctor Faustus and Greene's Friar Bacon and Friar Bungay, both based on the popular belief in magic, were presented on the London stage.
[328.] blacke Plutoes griesly Dame, Proserpine, the avenger of men, and inflicter of curses on the dead. She is identified with Shakespeare's Hecate, the goddess of sorcery, and with Milton's Cotytto, goddess of lust. To this latter sin the knight is tempted.
[332.] Great Gorgon, Demogorgon, whose name might not be uttered, a magician who had power over the spirits of the lower world. The poet is here imitating the Latin poets Lucan and Statius.
[333.] Cocytus, the river of wailing, and Styx, the river of hate, both in Hades. There were two others, Acheron, the river of sorrow, and Phlegethon, the river of fire.
[335.] Legions of Sprights. In this stanza and the preceding Spenser follows Tasso's Jerusalem Delivered, xiii, 6-11, where the magician Ismeno, guarding the Enchanted Wood, conjures "legions of devils" with the "mighty name" (l. 332).
[339.] chose. Imitation of Ariosto's Orlando Furioso, ii, 15, in which a false spirit is called up by a hypocritical hermit. The description of the House of Sleep in st. xxxix seq. is modelled on the same poet, Orlando Furioso, ii, 15 seq. The influence of Homer's Odyssey, xi, 16 is seen in st. [xxxix], ll. 348 seq.
[348.] Tethys, the ocean. In classical mythology she is the daughter of Uranus (heaven) and Gaea (earth), and the wife of Oceanus.
[349.] Cynthia, the moon. The allusion is to the story of Diana and Endymion. See Lyly's play Endymion.