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In page Perkin Warbeck:

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Perkin Warbeck's personal history is fraught with many unreliable and varying statements.[1] Warbeck said that he was Richard of Shrewsbury, Duke of York, the younger son of King Edward IV, who had disappeared mysteriously along with his brother Edward V after Richard, Duke of Gloucester, succeeded to the throne as King Richard III following the death of King Edward IV, his eldest brother, in 1483. After Warbeck was captured and interrogated in 1497 under the eye of King Henry VII, another version of his life was published, based on his confession. This confession is considered by many historians to be possibly only partially true as it was procured under duress.[citation needed]