Gunpowder Plot under King James had faded, leaving many English Catholics disappointed. His fellow plotters were John and Christopher Wright, Robert and Thomas Wintour, Thomas Percy, Guy Fawkes, Robert Keyes, Thomas Bates, John Grant, Ambrose Rookwood, Sir Everard Digby and Francis Tresham. Fawkes, who had 10 years of military experience fighting in the Spanish Netherlands in the failed suppression of the Dutch Revolt, was given charge of the explosives. The plot was revealed to the authorities in an anonymous letter sent to William Parker, 4th Baron Monteagle, on 26 October 1605. During a search of the House of Lords at about midnight
Ambrose Rookwood left the previous day to prepare the uprising, and told him what had happened in London. The group, which now included Catesby, his servant Thomas Bates, both Wright brothers, Percy and Rookwood, rode on to Dunchurch. While Fawkes was being tortured, on 6 November the government began to round up anyone they thought might be involved. Rookwood's servants, still in the house their master had so hastily departed, were questioned on the same day. His belongings at Clopton—including several incriminating Catholic symbols—were also taken, and by the time the plotters had reached Catesby's family home at Ashby St Ledgers, Rookwood's