Anthologies - Livre I: Etablissement, traduction et commentaire par J.-F. Bara (Études préliminaires aux religions orientales dans l'Empire romain, 111)
Vettius Valens (February 8, 120 – c. 175) was a 2nd-century Hellenistic astrologer, a somewhat younger contemporary of Claudius Ptolemy.
Valens' major work is the Anthology (Latin: Anthologia), ten volumes in Greek written roughly within the period 150 to 175. The Anthology is the longest and most detailed treatise on astrology which has survived from that period. A working professional astrologer, Valens includes over a hundred sample charts from his case files in the Anthology.
The first book of Valens' Anthology is a good introduction to Hellenistic Astrology, although it sometimes feels like it's been put together of various parts that the early editors of this work didn't know for sure where else to put them. On the one hand it introduces basic concepts like planet and sign (zoidion) signification, the 60 terms, commixtures of two and three stars, and on the other hand it introduces topics like various methods of calculating an unknown ascendant, zoidion ascensions, various conception techniques etc.
One of the key features is that Vettius Valens' work does not reference Ptolemy's four qualities (moist, dry, cold and hot) hence he does not use them to explain the various concepts and techniques of Hellenistic Astrology. It is certainly interesting in this regard.
One other thing of note is that once in a while you encounter vague references to platonic philosophical concepts that give rise to the hypothesis that the early founders of Hellenistic Astrology belonged to the platonic school of thought, which is certainly an entertaining hypothesis.
All in all, it just makes me want to delve deeply into Hellenistic Astrology, as well as Platonic Philosophy.