[Source: The Unpopular King: The Life and Times of Richard III by Alfred Owen Legge. The letter can also be found in Rosemary Horrox and P. W. Hammond, eds., British Library Harleian Manuscript 433. Gloucester: Richard III Society, 1979.]
This letter to Cecily, Duchess of York, was written on June 3, 1484. William Colyngbourne, named in the letter, later became famous for the treasonous rhyme, “The Cat, the Rat, and Lovel our dog / Ruleth all England under a Hog,” which he nailed to the door of St. Paul’s Cathedral on July 18, 1484. His chief offense, however, was to write to Henry Tudor to ask him to invade England. Colynbourne was tried and convicted in December 1484. For his execution, he was hung and cut down while still alive, after which his bowels were cast into a fire.