My issue is only with the term "a zodiac", which, as JKP and David also explained, is far from ideal. If you were to say to anyone who does not know the MS that there is "a zodiac" in it, they would probably expect something else.
Of course I agree that the signs can be used individually on separate pages. But then calling this "a zodiac" would be highly unusual, and I doubt this is ever done.
Of course I agree that the signs can be used individually on separate pages. But then calling this "a zodiac" would be highly unusual, and I doubt this is ever done.