 The desperate Kirreans immediately began drinking the water, unaware that Kleisthenes and his allies had poisoned it with hellebore.According to Polyaenus, a writer of the 2nd century AD, after the pipe was discovered, the attackers added the hellebore to the spring from which the water came, without ever actually depriving the Kirreans of water.Polyaenus also gave credit for the strategy not to Kleisthenes but to general Eurylochos, who allegedly advised his allies to gather a large amount of hellebore from Anticyra, where it was abundant.