... the Maiden is benefited, not by olive oil, but by water. For the Acropolis, owing to its great height, is over-dry, so that the image, being made of ivory, needs water or dampness. When I asked at Epidaurus why they pour neither water nor olive oil on the image of Asclepius, the attendants at the sanctuary informed me that both the image of the god and the throne were built over a cistern.