The upbringing-in-the-wild motif is evident not only in tales of the Fair Unknown and in Chrétien de Troyes' "Perceval, le Conte du Graal" but in the Breton lay "Tyolet". Known from only one Old French manuscript, dating to the late thirteenth or early fourteenth century, the lay itself was probably composed by the beginning of the thirteenth century. Like Perceval and Libeaus Desconus, Tyolet arrives at King Arthur's court as a young man who has spent all his childhood living alone in the forest with his mother. Like Perceval and Libeaus Desconus, what prompts Tyolet to go to King Arthur's court in the first place is the sight of armour. Unlike Chrétien's "Perceval", but like "Libeaus Desconus", an animal in this story is transformed into a human, in this case a stag which changes into an armed knight, a "knight-beast".