It tells the story of a king's son who embarks on a quest to find the sword of Saint Peter and receives help along the way from various creatures, including a woodpecker and seven lizards.
the story also paid emphasis on importance of gratitude and reciprocity as the king's son assists the woodpecker, who later becomes his loyal friend. Similarly, he offers aid to the seven lizards, who promise to help him in return.
The story also conveys the idea that kindness and generosity can lead to unexpected rewards, and the value of keeping promises and friendships.
RE: Folk Tales from Gascony: The Sword of Saint Peter, Part 4.