Poison Kills Ladon

Then, like raging hounds, they rushed to search for a spring; for besides their suffering and anguish, a parching thirst lay upon them, and not in vain did they wander; but they came to the sacred plain where Ladon, the serpent of the land, till yesterday kept watch over the golden apples in the garden of Atlas; and all around the nymphs, the Hesperides, were busied, chanting their lovely song. But at that time, stricken by Heracles, he lay fallen by the trunk of the apple-tree; only the tip of his tail was still writhing; but from his head down his dark spine he lay lifeless; and where the arrows had left in his blood the bitter gall of the Lernaean hydra, flies withered and died over the festering wounds. And close at hand the Hesperides, their white arms flung over their golden heads, lamented shrilly; and the heroes drew near suddenly; but the maidens, at their quick approach, at once became dust and earth where they stood.

[...]

And forth from these trees their forms looked out, as clear as they were before, a marvel exceeding great, and Aegle spake with gentle words answering their longing looks: "Surely there has come hither a mighty succour to your toils, that most accursed man, who robbed our guardian serpent of life and plucked the golden apples of the goddesses and is gone; and has left bitter grief for us. For yesterday came a man most fell in wanton violence, most grim in form; and his eyes flashed beneath his scowling brow; a ruthless wretch; and he was clad in the skin of a monstrous lion of raw hide, untanned; and he bare a sturdy bow of olive, and a bow, wherewith he shot and killed this monster here. So he too came, as one traversing the land on foot, parched with thirst; and he rushed wildly through this spot, searching for water, but nowhere was he like to see it.


- Apollonius Rhodius, Argonautica, Book 4