A bridge built by Argan in rage after having been twice cuckolded, by Uther Pendragon and Sir Hector. It was built near the castle known as Uther’s Shame.
Any knight who defeated its guardian had to assume the position himself; these unlucky victors included Tor and Hoel. Finally, Hoel, Kay, and Kehedin (Kahedins) defeated the fours sons of Argan and ended the custom.
Source
Prose Tristan | 1230-1240