In Heinrich von dem Türlin’s Diu Crône, Gawain required a magic skein of thread to cross a river. This he obtained by defeating the brother of its owner, Lady Ilamert of Lanoier.
Source
Diu Crône | Heinrich von dem Türlin, c. 1230
Nightbringer | The Arthurian Online Encyclopedia
In Heinrich von dem Türlin’s Diu Crône, Gawain required a magic skein of thread to cross a river. This he obtained by defeating the brother of its owner, Lady Ilamert of Lanoier.
Source
Diu Crône | Heinrich von dem Türlin, c. 1230