- Research fellow Newcastle University, 1964-1966. Lecturer British history Edinburgh University, 1966-1973, reader, 1973-1980, professor, since 1980, concurrent professor Nanjing University, since 1987.
Liberty and Property, 1977. British Radicalism and the French Revolution, 1986.
Caricatures and the Constitution 1760-1832, 1986, Politics of the People in Eighteenth Century Britain, 1995. Editor books in field, History journal., since 1993. Contributor articles to professional journals.
Fulbright scholar, 1973. Folger Library fellow, 1973. Huntington Library fellow, 1973.
Winston Churchill fellow, 1980, University of California at Los Angeles Clark LIbrary fellow, 1987.