From 1826 to 1828, he was Envoy Extraordinary to Brazil (during which time he negotiated the British-Brazilian Treaty of 1826), to the Ottoman Empire from 1828 to 1831 and to Austria from 1841 to 1847. He took leave twice during his stay in Vienna, with John Fiennes-Twisleton-Crampton (September to October 1842) and Arthur Magenis (31 July 1845 to April 1846) taking charge in his place.
From 1826 to 1828, he served as Envoy Extraordinary to Brazil (during which time he negotiated the British-Brazilian Treaty of 1826), to the Ottoman Empire from 1828 to 1831 and to Austria from 1841 to 1847. He took leave twice during his stay in Vienna, with John Fiennes-Twisleton-Crampton (September to October 1842) and Arthur Magenis (31 July 1845 to April 1846) assuming responsibility in his absence.