Some of the Arabians substituted a swallow for the northern of the two fishes--the one below Andromeda. The swallow was a symbol of Spring. According to Dupuis, Pisces represents the 8th "labour of Hercules," his triumph over the mares of Diomed which emitted fire from their nostrils.[428] But the connection between fishes and mares is not obvious, and some of Dupuis' ideas seem very fanciful. Here he seems to have found a "mare's nest." The constellation Cetus, the Whale, represents, according to ancient writers, the sea monster sent by Neptune to devour Andromeda when she was chained to the rock. Aratus calls Cetus the "dusky monster," and Brown remarks that "the 'Dusky Star' would be peculiarly appropriate to Mira (the wondrous ο Ceti)."[429] Cetus was also called Canis Tritonis, or Dog of the Sea, Bayer in his Atlas (1603) shows a dragon instead of a whale, finding it so represented on some ancient spheres. Al-Sufi calls it Kîtus or κητος, the whale. He says, "it is represented by the figure of a marine animal, of which the fore part is turned towards the east, to the south of the Ram, and the hinder part towards the west behind the three 'extern' stars of Aquarius." Al-Sufi does not mention the variable star ο Ceti, now called Mira, or the "wonderful," nor does he refer to any star in its immediate vicinity. We may, therefore, conclude that it was near a minimum of light at the time of his observation of the stars of Cetus. The constellation of Orion, one of the finest in the heavens, was called by Al-Sufi _al-djabbar_, "the Giant," and also _al-djauza_, "the Spouse." The poet Longfellow says-- "Sirius was rising in the east And, slow ascending one by one, The kindling constellations shone Begirt with many a blazing star Stood the great giant Al-gebar Orion, hunter of the beast! His sword hung gleaming at his side And on his arm, the lion's hide-- Scattered across the midnight air The golden radiance of its hair." Al-Sufi says it "is represented by the figure of a standing man, to the south of the sun's path. This constellation very much resembles a human figure with a head and two shoulders. It is called _al-djabbar_, 'the Giant,' because it has two thrones, holds a club in his hand, and is girded with a sword." Orion is supposed to have been a son of Neptune; but there are many stories of the origin of the name. It is also said to be derived from the Greek word ωρα, because the constellation was used to mark the different times of the year. According to the ancient fable, Orion was killed by a scorpion, and was placed in the sky at the request of Diana. According to Houzeau, the name comes from _oriri_, to be born. Scorpio rises when Orion sets, and he thinks that the idea of the ancients was that the Scorpion in this way kills the giant Orion.