Robert and Thomas Wintour is written about the Gunpowder Plot is derived from Thomas's confession, signed on 23 November 1605; details of the so-called Spanish Treason were added three days later. One of only two confessions printed in the "King's Book" (a highly partial contemporary account of the affair), Thomas Wintour's was the only account the government had of a plotter who had been involved from the beginning; Guy Fawkes, weakened by days of torture, may have been at the heart of the group, but he was not at its first meetings. However, Antonia Fraser views the document with suspicion, not least because Thomas's
Robert and Thomas Wintour Tresham. The latter's involvement in the plot has long been the subject of controversy, as on 26 October his brother-in-law William Parker, 4th Baron Monteagle, received an anonymous letter while at home, warning him to stay away from Parliament. Thomas went with Catesby to confront Tresham on the matter, threatening to "hang him" if he did not exonerate himself. Tresham managed to convince the pair that he was innocent, but Thomas then tried unsuccessfully to persuade Catesby to abandon the plot. His pleas were in vain; Catesby's position was echoed by Percy, who at a meeting of the three in