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 London on Sunday 3 November, said that he was ready to "abide the uttermost trial". On the same day, Robert and three others stayed at the home of John Talbot of Grafton, his father-in-law. His friends were Robert Acton and his two sons, plus servants. The group left the following morning with extra horses supplied by Everard Digby, and travelled to Coventry. Monteagle had delivered the letter to the English Secretary of State, Robert Cecil, 1st Earl of Salisbury, and on Saturday 2 November (about a week later) the Privy Council decided to undertake a search of Parliament. The following