Ellys continued to hold his prebend and his city living in commendam, and went every Sunday morning in winter from his house in Queen Square to preach to his parishioners.
There was some objection to the nomination of an upholder of the Test Act as bishop; But Archbishop Thomas Herring, supported Ellys's preferment, a safe pair of hands and attached to the ecclesiastical establishment.
Ellys gave little support to the scheme of John Jones of Welwyn for establishing a seminary for clerical education in his diocese.
He published nothing more in his lifetime but a few sermons, preached on special occasions before the Lords, the Commons, and the Society for the Propagation of the Gospel.
After his death his friends published his Tracts on the Liberty spiritual and temporal of the Protestants of England, which was either a fragment or the whole of the long-expected great work.