[1] It is Aarne-Thompson type 502 titled "The Wild Man as a Helper" and is the oldest known written variant of it.
One day while hunting, the king captures a big, tall, deformed wild man.
The wild man steals an arrow he carried and promises to give it back if Guerrino will free him.
The queen takes two faithful servants, gives them money, and sends Guerrino away, fearing what the king might do to punish him.
The queen tells him that Guerrino freed him and then that she has sent him away, which enrages the king, that she would think he would hold his son in less regard than the wild man.
They come to the town of Irlanda, ruled by King Zifroi, who has two beautiful daughters, Potentiana and Eleuteria.
They say that Guerrino had boasted likewise of the wild mare and King Zifroi sets him to defeat it as well.
The night after, he is woken by a noise; finding a wasp in a honey pot, he frees it.