In one fairy tale, an old blind pech is on his deathbed. He asks his sons if he can feel their arm muscles, to feel how strong they've grown. His sons play a prank on him, giving him a metal cup instead of one son's arm. He snaps the metal cup with his fingers, shattering it, to the amazement of the sons. Even sick on his deathbed, he is stronger than his young healthy sons.
- Chambers, Robert (1870). Popular Rhymes of Scotland. pp. 80.
- Douglas, George (1901). Scottish Fairy and Folk Tales.
- Stevenson, J.H. (1899). The Scottish Antiquary or Northern Notes & Queries.