Cardenio
Cardenio,a lost play by Shakespeare, probably in collaboration with Fletcher , acted at Court in 1613 . Theobald in his play Double Fals'hood ( 1728 ) claimed to have made use of an old prompt copy of Cardenio, but this has never been seen since and Theobald's version lacks Shakespearian touches. It may be assumed, however, that Shakespeare's play, like Theobald's, was based on the story of Cardenio and Lucinda in Don Quixote (Part 1, chs. 24–8); Cardenio is the Ragged Knight, who, driven mad by the loss of his loved Lucinda, haunts the Sierra Morena, and is eventually reunited with her.