However, Tristan and Iseult find the potion on the boat ride to Cornwall, and mistaking it for regular wine, they drink it.
Mark has finally discovered his wife and nephew's adultery and banishes Tristan to Brittany, where the saddened knight tries to forget his love by marrying another girl named Iseult, this one the daughter of King Hoel and sister of Kahedin.
When questioned, Tristan reveals his secret love and attempts to prove how beautiful his original Iseult was by showing Kahedin a statue he had made of her.
However, Kahedin is more impressed by a second statue of Brangaine, and journeys with Tristan back to Mark's lands in hopes of meeting her.
According to Rachel Bromwich, several parallels can be drawn between the character of Brangaine in French Arthurian romance and that of Branwen in medieval Welsh legend, lending credence to the theory that the former is ultimately based on the latter.