We've got the Livro de São Cipriano, a witchcraft manual - in a country of 'desenrascanço' you just use whatever works to achieve your goals. Saints, witchcraft, or a bit of each. But for treasure you can also casually stroll around your local special boulder. The Moira might appear to you, or you find an entrance, and inside sits the Moira at a table. If your heart is pure she will give you treasure. The greedy will find that they brought home nothing but coal or rocks. The stories about Moiras appearing to peasants are so strikingly similar to the story of Our Lady of Fátima!