"Well, then," said Regin, "ask for a horse of them."

"Yea," quoth Sigurd, "and that shall I have, whenso I have need
thereof."

Thereafter Sigurd went to the king, and the king said --

"What wilt thou have of us?"

Then said Sigurd, "I would even a horse of thee for my disport."

Then said the king, "Choose for thyself a horse, and whatso thing
else thou desirest among my matters."

So the next day went Sigurd to the wood, and met on the way an
old man, long-bearded, that he knew not, who asked him whither
away.

Sigurd said, "I am minded to choose me a horse; come thou, and
counsel me thereon."

"Well then," said he, "go we and drive them to the river which is
called Busil-tarn."

They did so, and drave the horses down into the deeps of the
river, and all swam back to land but one horse; and that horse
Sigurd chose for himself; grey he was of hue, and young of years,
great of growth, and fair to look on, nor had any man yet crossed
his back.