According to Gruson and Brugsch, the Zodiacal Light was known in ancient times, and was even worshipped by the Egyptians. Strabo does not mention it; but Diodorus Siculus seems to refer to it (B.C. 373), and he probably obtained his information from some Greek writers before his time, possibly from Zenophon, who lived in the sixth century B.C.[255] Coming to the Christian era, it was noticed by Nicephorus, about 410 B.C. In the Koran, it is called the "false Aurora"; and it is supposed to be referred to in the "Rubáiyát" of Omar Khayyam, the Persian astronomical poet, in the second stanza of that poem (Edward Fitzgerald's translation)-- "Dreaming when Dawn's Left Hand was in the Sky,[256] I heard a voice within the Tavern cry, Awake, my Little ones, and fill the Cup, Before Life's Liquor in its Cup be dry." It was observed by Cassini in 1668,[257] and by Hooke in 1705. A short description of its appearance will be found in Childrey's _Britannia Baconica_ (1661), p. 183. The finest displays of this curious light seem to occur between the middle of January and the middle of February. In February, 1856, Secchi found it brighter than he had ever seen it before. It was yellowish towards the axis of the cone, and it seemed to be brighter than the Milky Way in Cygnus. He described it as "un grande spectacle." In the middle of February, 1866, Mr. Lassell, during his last residence in Malta, saw a remarkable display of the Zodiacal Light. He found it at least twice as bright as the brightest part of the Milky Way, and much brighter than he had previously seen it. He found that the character of its light differed considerably from that of the Milky Way. It was of a much redder hue than the Galaxy. In 1874 very remarkable displays were seen in the neighbourhood of London in January and February of that year; and in 1875 on January 24, 25, and 30. On January 24 it was noticed that the "light" was distinctly reddish and much excelled in brightness any portion of the Milky Way. Humboldt, who observed it from Andes (at a height of 13,000 to 15,000 feet), from Venezuela and from Cumana, tells us that he has seen the Zodiacal Light equal in brightness to the Milky Way in Sagittarius. As probably many people have never seen the "light," a caution may be given to those who care to look for it. It is defined by the Rev. George Jones, Chaplain to the "United States' Japan Expedition" (1853-55), as "a brightness that appears in the western sky after sunset, and in the east before sunrise; following nearly or quite the line of the ecliptic in the heavens, and stretching upwards to various elevations according to the season of the year." From the description some might suppose that the light is visible _immediately_ after sunset. But this is not so; it never appears until twilight is over and "the night has fully set in."