On the evening of the same day, at twilight, the poets enter the Inferno. This great subterranean cavity, shaped like an inverted cone (see fig. 45), is divided into nine circles, in which the different classes of sinners are punished. In this blind world of eternal darkness no star shines, and the sun is never once mentioned as timegiver; when Virgil wishes to remind Dante that they must hasten, he refers to the position of moon or stars, and the former is called “La Donna che qui regge.”[455] ------------------------------------------------------------------------ [455] “The Lady who rules here.” _Inf._ x. 80. ------------------------------------------------------------------------ After passing through four circles, Virgil says that every star is now sinking which was ascending when he started, indicating that it is now six hours since they entered the Inferno, or soon after midnight. He does not mean that all these stars are setting, but that they have crossed the meridian, and are at some point of their descent towards the west. Strictly speaking this does not apply to stars north of the equator, since they take more than six hours to reach the meridian, being above the horizon for more than twelve. Perhaps Virgil is thinking chiefly of the constellations of the zodiac. The poets cross the fifth circle, enter the “basso Inferno”[456] or city of Dis, and on the edge of the precipice which borders the circle of the Heretics they sit while Virgil explains the system of the several circles. Then he expresses a wish to continue the journey, for the Fishes (of the zodiac) are quivering on the horizon, and the Wain lies to the north-west. As it is the time of the Vernal Equinox, and the sun is in Aries, Pisces is the zodiacal sign immediately preceding the sun, and begins to rise about four in the morning. The part of Ursa Major called the Wain is somewhat less than 180° distant from Pisces; hence when the latter appears on the eastern horizon the former will be in the west (and of course always in the north). The “Caurus” of the Latins was the wind from the north-west. ------------------------------------------------------------------------ [456] “Lower Hell.” _Inf._ viii. 75. ------------------------------------------------------------------------