The Mabinogion is the earliest collection of prose found in Britain, compiled in the 12th century from spoken word.
They are stories of pre Christian Celtic mythology, and Anglo-French influences.
Based on the story of Ceridwen, a powerful witch who had two children, a beautiful girl and an ugly son. To help him, she made a potion of knowledge. This potion would only be contained in the first three drops, after that it became a poison. Ceridwen's boy helper Gwion was stirring the potion and accidentally spilled some on his hand and instinctively licked it off, thus obtaining the knowledge. A powerful chase ensued where both Gwion and Ceridwen changed themselves into various animals, At one stage Gwion became a hare and Ceridwen, a greyhound. Eventually, while they fought in the sea, Ceridwen swallowed Gwion.
The witch later gave birth to Gwion, who had now become the child prodigy Taliesin, who later became a well known poet and prophet.