We will complete these descriptions by a little astronomical chronology, which is not without interest. From a careful examination of the most ancient historical sources of classical astronomy, the following is the order in which the constellations appear to have been noticed, formed, and named, beginning with the most ancient: Most Ancient Reference The Great Bear _Job_ (ch. xxxviii. ver. 32) (Seventeenth Century before our era), _Homer_ (Ninth Century). Orion _Job_ (ch. ix. ver. 9), _Homer_, _Hesiod_. The Pleiades (the Hyades) _Job_ (ch. xxxviii. ver. 31), _Homer_, _Hesiod_. Sirius and the Great Dog _Hesiod_ mentions it. _Homer_ calls Sirius the Star of Autumn. Aldebaran (Taurus) _Homer_, _Hesiod_. Boötes, Arcturus _Job_ (ch. xxxviii. ver. 32), _Homer_, _Hesiod_. The Little Bear _Thales_ (Seventh Century), _Eudoxus_, _Aratus_. Draco (the Dragon) _Eudoxus_ (Fourth Century), _Aratus_ (Third Century). The Man on his Knees, or Hercules _Id._ The Branch and Cerberus[12] _Id._ Corona Borealis _Id._ Ophiuchus or Serpentarius _Id._ The Scorpion _Id._ Virgo and Spica _Eudoxus_ (Fourth Century), _Aratus_ (Third Century) Gemini (the Twins) _Id._ Procyon _Id._ Cancer (the Crab) _Id._ Leo (the Lion) _Id._ Auriga (the Charioteer) _Id._ Capella (the Goat, the Kids) _Id._ Cepheus _Id._ Cassiopeia _Id._ Andromeda _Id._ Pegasus (the Horse) _Id._ Aries (the Ram) _Id._ The Triangle _Id._ Pisces (the Fishes) _Id._ Perseus _Id._ Lyra _Id._ The Bird, or Cygnus (the Swan) _Id._ Aquila (the Eagle) _Id._ Aquarius _Id._ Capricornus _Id._ Sagittarius _Id._ Sagitta (the Arrow) _Id._ Delphinus (the Dolphin) _Id._ Lepus (the Hare) _Id._ Argo (the Ship) _Id._ Canobus (afterward written Canopus) _Id._ Eridanus _Id._