Ambrose Rookwood the House of Lords, Guy Fawkes, was discovered there and arrested. Rookwood fled the city, and informed Catesby and the others of the plan's failure. Together the remaining conspirators rode to Holbeche House in Staffordshire, where on 8 November they were attacked by the pursuing Sheriff of Worcester and his men. Catesby was killed, but Rookwood survived, and was imprisoned in the Tower of London. Rookwood and the survivors were arraigned on 27 January 1606 in Westminster Hall. Pleading not guilty, he claimed to have loved Catesby "above any worldly man". His subsequent request for mercy was ignored, however, and
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