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
Ambrose Rookwood (Jacobite) or assassinate William III. In February Thomas Prendergast, one of the conspirators, turned king's evidence, and the plot was revealed. On 27 March Rookwood was found in bed in a Jacobite alehouse, and committed to Newgate Prison. On 7 April a true bill of high treason was found against Rookwood at the Middlesex county sessions. He was brought before the King's Bench on 21 April. His case, tried with those of Robert Lowick and Charles Cranburn who was a Jacobite quartermaster, was the first treason trial to use the new system of procedure brought in by the Treason Act 1695,