Many extraordinary superstitions survive with regard to these islands. They were supposed to be the abode of the souls of certain Druids, who, not holy enough to enter the heaven of the Christians, were still not wicked enough to be condemned to the tortures of annwn, and so were accorded a place in this romantic sort of purgatorial paradise. In the fifth century a voyage was made, by the British king Gavran, in search of these enchanted islands; with his family he sailed away into the unknown waters, and was never heard of more. This voyage is commemorated in the triads as one of the Three Losses by Disappearance, the two others being Merlin's and Madog's. Merlin sailed away in a ship of glass; Madog sailed in search of America; and neither returned, but both disappeared for ever. In Pembrokeshire and southern Carmarthenshire are to be found traces of this belief. There are sailors on that romantic coast who still talk of the green meadows of enchantment lying in the Irish channel to the west of Pembrokeshire. Sometimes they are visible to the eyes of mortals for a brief space, when suddenly they vanish. There are traditions of sailors who, in the early part of the present century, actually went ashore on the fairy islands--not knowing that they were such, until they returned to their boats, when they were filled with awe at seeing the islands disappear from their sight, neither sinking in the sea, nor floating away upon the waters, but simply vanishing suddenly. The fairies inhabiting these islands are said to have regularly attended the markets at Milford Haven and Laugharne. They made their purchases without speaking, laid down their money and departed, always leaving the exact sum required, which they seemed to know, without asking the price of anything. Sometimes they were invisible, but they were often seen, by sharp-eyed persons. There was always one special butcher at Milford Haven upon whom the fairies bestowed their patronage, instead of distributing their favours indiscriminately. The Milford Haven folk could see the green fairy islands distinctly, lying out a short distance from land; and the general belief was that they were densely peopled with fairies. It was also said that the latter went to and fro between the islands and the shore through a subterranean gallery under the bottom of the sea.