Note 21 — FIRST PART. The Story of Astronomy from Primitive Times until the Age of Dante.
Reading edition
If Taurus was originally considered the first constellation of the zodiac, instead of Aries, of which there are some indications, the change may well be explained by this change of method. It does not necessarily imply that the equinox was in Taurus when our zodiac was invented. It was near ω Arietis in b.c. 1000.