representing the second labour of Hercules in which he slays the Lernean Hydra, the base cast and chased as a rock outcrop which supports the Hydra, the base applied with foliage and creatures and the figure of Iolaus who is holding a dagger to one of the necks of the Hydra, all surmounted by Hercules, draped in a lion's pelt and loin cloth, on a malachite base