Suggestions for v0.8

[Avicenna]

Well there's accounts by Herodotus, Frontinius, Pliny, Pausanias, Plutarch, Quintus of Smyrna, Strabo, Ovid, Silius Italicus, Homer (indirectly: describes wounds caused by arrows with snake venom accurately, also giving symptoms), Virgil and others that you probably wouldn't have heard of. Poison is always mentioned in the Iliad, sometimes in the Odyssey, and in myths. Cerberus has poisonous drool, Odysseus, Achilles, Hercules, Paris and Philoctetes used poison weapons, and the Greeks had accurate descriptions of the poisonous plants, where to find them and the symptoms if you had been poisoned. Assassination by poisoning was common as well, with offers to Romans to poison Pyrrhus and Ariminius. The Greeks poisoned the water supply of the Kirrhans with hellebore. Military tacticians always advise armies to camp in healthy areas, obviously having had a history of receiving or giving water that was contaminated. The ancients were very much used to using poison in warfare. Do you think it was a coicidence that when the Spartans were losing in the Peloponnesian War, with their offer of ceasefire was rejected, that Athens suddenly broke out with a plage from its port? The first thing that Athens did was to accuse Sparta for this plague. The Indians also had whole guides on how to poison the enemy and how to counter these poisons, so if the Greeks didn't know about poisons they surely would after having travelled to India and been on the receiving end.

Do you still want more evidence?

edit: add Livy to that list.