 He was elected a fellow of the Society of Antiquaries of London in 1789; and in 1793 he published "Inquiries into the Origin and Progress of the Science of Heraldry in England, with Explanatory Observations on Armorial Ensigns".He returned to Oxford, where he studied medicine at the Radcliffe Infirmary, graduating MB in December 1793.He had dedicated his "Origin and Progress of Heraldry" to Charles Howard, 11th Duke of Norfolk, the Earl Marshal, and through the Duke's influence he was appointed chaplain and physician to the British embassy to the Ottoman Empire led by Robert Liston.