Soon after the production of this Treatise we find Poly dore holding the Office of chamberlain to Pope Alexander the Sixth, by whom, in or soon after 1501, he was sent to England as sub-collector of the tribute called Peter Pence, under the auspices of Adrian de Castello his kins man, already mentioned, who had been raised to the purple under the title of Cardinal S. Chrysogoni, and who was his superior In the Office of treasurer and col lector of the Papal tribute.