After his father was executed for high treason in October 1283 he became the de jure Prince of Gwynedd.

"What fashion of man is this Prince of Gwynedd?"

He has told the king to his face that he'll come no more to court while the Prince of Gwynedd is made welcome there.

Yet you'll not deny," said Harry, "that the Prince of Gwynedd himself has kept the peace loyally.

He knows well that I have sworn not to attend on him on any occasion when the Prince of Gwynedd is received at court.

Before July was out it became clear that the Prince of Gwynedd also considered himself to I be at feud on his men's account.

The Prince of Gwynedd was dear friend to them both.

This boy is foster-son to the Prince of Gwynedd.

Rash and presumptuous you are, but draw back from this coil now, and leave the Prince of Gwynedd in peace.

And even if the Prince of Gwynedd should send an army to set him free, how were they to get him out of that impregnable hold?