Editing Rhiannon (section)

===''Y Mabinogi'': Third Branch===
Pryderi returns from the disastrous Irish wars as one of the only Seven Survivors. [[Manawydan]] is another Survivor, and his good comrade and friend. They perform their duty of burying the dead king of Britain's head in London ([[Bran the Blessed]]) to protect Britain from invasion. But in their long time away, the kingship of Britain has been usurped by Manawydan's nephew [[Caswallon]].

Manawydan declines to make more war to reclaim his rights. Pryderi recompenses him generously by giving him the use of the land of Dyfed, though he retains the sovereignty. Pryderi also arranges a marriage between the widowed Rhiannon and Manawydan, who take to each other with affection and respect. Pryderi is careful to pay homage for Dyfed to the usurper Caswallon to avert his hostility.

Manawydan now becomes the lead character in the Third Branch, and it is commonly named after him. With Rhiannon, Pryderi and Cigfa, he sits on the Gorsedd Arberth as Pwyll had once done. But this time disaster ensues. Thunder and magical mist descend on the land leaving it empty of all domesticated animals and all humans apart from the four protagonists.

After a period of living by hunting the four travel to borderland regions (now in England) and make a living at skilled crafts. In three different cities they build successful businesses making saddles, shields, then shoes. But vicious competition puts their lives at risk. Rather than fight as Pryderi wishes, Manawydan opts to quietly move on. Returning to Dyfed, Manawydan and Pryderi go hunting and follow a magical [[white boar]], to a newly built tower. Against Manawydan's advice, Pryderi enters it to fetch his hounds. He is trapped by a beautiful golden bowl. Manawydan returns to Rhiannon who rebukes him sharply for failing to even try to rescue his good friend. But her attempt to rescue her son suffers the same fate as he did. In a "blanket of mist", Rhiannon, Pryderi and the tower vanish.

Manawydan eventually redeems himself by achieving restitution for Rhiannon, Pryderi, and the land of Dyfed. This involves a quasi-comical set of magical negotiations about a pregnant mouse. The magician Llwyd ap Cilcoed is forced to release both land and family from his enchantments, and never attack Dyfed again. His motive is revealed as vengeance for his friend Gwawl, Rhiannon's rejected suitor. All ends happily with the family reunited, and Dyfed restored.