William's handwriting was laid on the shelf. He remained in London during the next few days transacting secretarial business, but his wife joined Mary and entered London with her. Petre had been identified with the council's most obnoxious proceedings towards Mary, and his position was at first insecure. He resumed attendance at the council on 12 August, but in September, it was rumoured that he was out of office. He was however, installed Chancellor of the Order of the Garter on 26 September when he was directed by the Queen to expunge the new rules formulated during the late reign. He further ingratiated himself with Mary by his zeal in tracing the accomplices of Wyatt's rebellion and by his advocacy of the Spanish marriage. Petre now devoted himself exclusively to his official duties; he rarely missed attendance at the council and was frequently employed to consult with foreign ambassadors. He acquiesced in the restoration of the old religion, and took a prominent part in the reception of Pole and ceremonies connected with the absolution of England from the guilt of heresy. As Petre had acquiesced in the Reformation under Henry VIII, so now he acquiesced in the re-establishment of the Pope's authority and the restoration of the Roman form of service, and was one of the foremost at Cardinal Pole's reception when he came on a mission from the Pope. With his vast Church property, it behoved Sir William to stand well with the new religious authorities; Cardinal Pole had come with instructions not to be too particular about the restoration of abbey lands. Mary approved the scheme drawn up by him. With great dexterity, William succeeded in obtaining a 'Bull of Confirmation' confirming him in possession of the lands he had derived from the suppression of the monasteries. Pope Paul IV granted this on 27 November 1555. This is believed to be a unique document. Sir William was also absolved from the Interdict of Excommunication placed upon Henry VIII. He was allowed to retain his lands, but was exhorted to endow a charity foundation and to provide pensions for the needy inhabitants of Ingatestone, who had been deprived of their accustomed doles from the monasteries by the wholesale dissolution and destruction that had taken place, so largely by the aid of William Petre himself. This bull is a lengthy document, and enumerates all the Church lands Sir William Petre