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In page Battle of Stoke Field:

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An impostor claiming to be Edward (usually identified as Edward, Earl of Warwick, but may have initially begun by claiming to be one of the princes in the tower), whose name was Lambert Simnel, came to the attention of John de la Pole, Earl of Lincoln, through the agency of a priest called Richard Symonds.[2] Lincoln, although apparently reconciled with the Tudor king,[citation needed] had a claim on the throne; the last Plantagenet, Richard III of England, had named Lincoln, his nephew, as the royal heir. Although he probably had no doubt about Simnel's true identity, Lincoln saw an opportunity for revenge and reparation.[1]