The name of three damsels who served the Fisher King. Their names reflected the cart in which they traveled, which contained some 150 heads in sealed boxes. They included the heads of Adam and Eve.
The Maiden of the Cart most often mentioned had gone bald when Perceval failed at the Grail Castle. Afterwards, the Maiden traveled to Britain and tried to rectify the situation by guiding Perceval, Gawain, and Lancelot towards holy quests. Her tasks were completed when Perceval killed the Black Hermit.
Source
Perlesvaus | Early 13th century