Book 2
37.4
All this was proved in the demonstration. At the source of the Amymone grows a plane tree, beneath which, they say, the hydra (water-snake) grew. I am ready to believe that this beast was superior in size to other water-snakes, and that its poison had something in it so deadly that Heracles treated the points of his arrows with its gall. It had, however, in my opinion, one head, and not several. It was PeisanderPeisander wrote a poem on the labors of Heracles. His date is uncertain, but perhaps he flourished about 645 B.C. of Camirus who, in order that the beast might appear more frightful and his poetry might be more remarkable, represented the hydra with its many heads.
37.5
I saw also what is called the Spring of Amphiaraus and the Alcyonian Lake, through which the Argives say Dionysus went down to Hell to bring up Semele, adding that the descent here was shown him by Palymnus. There is no limit to the depth of the Alcyonian Lake, and I know of nobody who by any contrivance has been able to reach the bottom of it since not even Nero, who had ropes made several stades long and fastened them together, tying lead to them, and omitting nothing that might help his experiment, was able to discover any limit to its depth.
