Archdeacon of Canterbury.[13] Twice the superior influence of the archdeacon obtained his dismissal from the service of Theobald; twice he was reinstated by the good offices of Walter, Bishop of Rochester. At length the elevation of Roger to the see of York left the field open to Becket. He was appointed to the vacant archdeaconry, the richest benefice, after the bishoprics, in England. From that time he ruled without rival in the favor of the aged Theobald. Preferments were heaped upon him by the lavish bounty of his patron.[14] During his exile he was reproached with his ingratitude to the king, who had raised him from poverty. "Poverty!" he rejoined; "even then I held the archdeaconry of Canterbury, the provostship of Beverley, a great many churches, and several prebends."[15] The trial and the triumph of Becket's precocious abilities was a negotiation of the utmost difficulty with the court of Rome. The first object was to obtain the legatine power for Archbishop Theobald; the second tended, more than almost all measures, to secure the throne of England to the house of Plantagenet. Archbishop Theobald, with his clergy, had inclined to the cause of Matilda and her son; they had refused to officiate at the coronation of Eustace, son of King Stephen. Becket not merely obtained from Eugenius III. the full papal approbation of this refusal, but a condemnation of Stephen (whose title had before been sanctioned by Eugenius himself,) as a perjured usurper.[16] [SN: Accession of Henry II. Dec. 19, 1154.]