CONCERNING CLEOMEDES.

Cleomedes, a Greek author, wrote an elegant treatise on the celestial circles, which is still extant.

CONCERNING ARATUS.

Aratus, a poet from Soli, was a student of Menecrates in grammar and of Timon and Menedemus in philosophy. He flourished in the 124th Olympiad during the reign of Antigonus in Macedonia, the son of Demetrius Poliorcetes, in whose company he lived in honor until the very end. He was a versifier.
He wrote the Phaenomena The Appearances.
Hymns to Pan.
Also works on medicine pertaining to the composition of theriaca antidote/treacle.
Furthermore, works on morals: