In 1795 he received the aid of a coadjutor in his professorship, and two years later he lectured for the last time.
At this time he was nominated to the pope as coadjutor of Geneva,' and after a visit to Rome he assisted Bishop de Granier in the administration of the newly converted countries and of the diocese at large.
For La Devineresse he and his coadjutor de Vise (1638-1710, founder of the Mercure galant, to which Thomas contributed) received above 6000 livres, the largest sum known to have been thus paid.
In the following year Vigors returned to the subject in some papers published in the recently established Zoological Journal, and found an energetic condisciple and coadjutor in Swainson, who, for more than a dozen years - to the end, in fact, of his career as an ornithological writer was instant in season and out of season in pressing on all his readers the views he had, through Vigors, adopted from Macleay, though not without some modification of detail if not of principle.
Henry on his side looked to find in Becket the archbishop a coadjutor as loyal as Becket the archdeacon; and anticipated that the Church would once more be reduced to that state of dependence in which she had stood during the latter years of Henry I.