Editors. "Henry VII denounces Perkin Warbeck to Margaret, Duchess of Burgundy". The Literary Encyclopedia. First published 01 November 2010
[http://www.litencyc.com/php/stopics.php?rec=true&UID=13917, accessed 23 April 2014.]
Henry VII denounces Perkin Warbeck to Margaret, Duchess of Burgundy. Although most probably Flemish in origin, Warbeck claimed to be Richard of Shrewsbury, 1st Duke of York, the younger son of Edward IV, who was imprisoned in the Tower along with his brother Edward V under the kingship of Richard III. Edward IV's sister Margaret of Burgundy, however, refused to heed this denunciation, officially recognising Warbeck as her nephew.