From the time of William the Conqueror, the Greys were one of England’s most powerful families. Beginning in the reign of Henry IV (1399–1413), when the rivalry between Lord Grey of Ruthyn and Owain Glyndwr led to the Welsh uprising, this history follows their fortunes through the Wars of the Roses, in which Greys fought and died on both sides, to their downfall with the execution in 1554 of the ‘Nine Days Queen’, Lady Jane Grey.