In 1741 Challoner was raised to the episcopal dignity at Hammersmith, and nominated coadjutor with right of succession to Bishop Benjamin Petre, vicar-apostolic of the London district, whom he succeeded in 1758.
The manor remained in possession of the abbot until the Dissolution, when it was granted to Sir William Petre.
It was rumoured in December 1554 that Cecil would succeed Sir William Petre as secretary, an office which, with his chancellorship of the Garter, he had lost on Mary's accession.
On the southwestern side is Petre Bay, on which, at the mouth of the river Mantagu, is Waitangi, the principal settlement.
In London Geddes soon received an appointment in connexion with the chapel of the imperial ambassador, and was also helped by Lord Petre in his scheme for a new Catholic version of the Bible.