In old Brittany, where the fairies of the land are called Margot-la-Fee, a tailor did a favor for a rich fairy lady. In return she gave him the key to her cavern, which had been scooped out of' the rocks as a rough shelter from the rains. 
           "Take what you will," said the Margot-la-Fee. "Or take what you can." She smiled, and her green eyes looked like the sun through trees. 
           So the tailor took the key, but he forgot to thank her, which was a very silly thing to do.  He hurried to the cavern, opened the door, and went in. What should he discover there but three enormous piles of money.  The first pile, all gold coins called louis d'or, sat atop a white sheep.  The second pile, all silver coins, rested on the back of a gray sheep. The third pile, all copper coins, lay across the back of a black sheep. 
           "And who gave you permission to enter'?" asked the white sheep, blinking her strange green eyes. 
           My lady Margot-la-Fee," said the tailor.  He held up the key.  "She told me to take what I will or what I can." 
           "Then take it will ye, nil ye," said the white sheep.  The other sheep nodded, but said nothing. 
           So the tailor put the key in his mouth and filled his pockets with coins, gold, silver, and copper.  But there was plenty left he could not carry. "Would you be able to carry even more," said the sheep at last, "If you went back and fetched a sack?" 
           The tailor struck his hand to his head.  "0f course!" he mumbled, spitting out the key.  He emptied his pockets and shook out his shirt and ran from the cavern all the way home. 
           In less than an hour he was back with the largest sack he could find. But search as hard as he could, and as long as he might, he could not find the Margot's cave again.