Now among a people so superstitious as the Greeks it is reasonable to suppose that days thus marked by special abstinences were originally sacred to some deities. Washing and tree-cutting at this season must, we may assume, have been offences against some supernatural persons whose festival was then observed and who avenged its profanation; and the supernatural persons most nearly concerned would naturally be the tree-nymphs and the water-nymphs. The association or even confusion of these two classes of nymphs is very common both in ancient literature and in modern belief, and is indeed a natural consequence of the fact that the finest trees, such as that plane under which sat Socrates and Phaedrus, grow only in the close vicinity of water. It would have puzzled even Socrates to say whether the Nymphs by whom he might be seized would be more probably Dryads or Naiads. Homer himself, to go yet further back, suggests the same association, for he tells of ‘a spreading olive-tree and nigh thereto’ the cave of the Naiads in Ithaca. Again in later times we find a dedication by one Cleonymus to ‘Hamadryads, daughters of the river’[386]; and though an ingenious critic would replace Ἁμαδρυάδες by Ἀνιγριάδες (nymphs of the Arcadian river Anigrus), I believe the fault to lie with Cleonymus and not with the manuscript; for the place where he makes his dedication is beneath pine-trees (ὑπαὶ πιτύων). At the present day the same tendency towards confusion of the two classes is common. This was well illustrated to me by some peasants of Tenos. Ten minutes’ walk from the town there is a good spring from which a remarkable subterranean passage cut through the solid rock carries the water to supply the town. The spring is within a cave, artificially enlarged at the entrance, over which stands a fine fig-tree. Standing outside while a companion entered first, I noticed that our guides (for several persons had escorted us out of curiosity or hospitality) were distinctly perturbed, and I heard one say to another, ‘See, he is going in, he is not afraid.’ Inferring thence that the place was haunted, and remembering that mid-day, the hour at which we happened to be there, was fraught with special peril, I determined to test my guides, and so sat down under the fig-tree. Then remarking that the sun was hot at noon, I invited them to come and sit in the shade and smoke a cigarette. But the bait was insufficient; they would stand in the sun rather than approach either the spring or the tree, though they were ready enough to accept cigarettes when I moved out of the zone of danger. Afterwards by enquiries made elsewhere I learnt that the spot was the reputed home of Nereids--but whether their abode was tree or water, who should say? Close neighbours in their habitations, indistinguishable in their appearance and attributes, it is pardonable to confuse those sister nymphs, ‘Centum quae siluas, centum quae flumina seruant[387].’