"has even taught Rhetoric at the University of Cambridge"
is the study of how language can be used to persuade, in a debate, argument or court of law. It was considered an important part of education from ancient Greece to the 19th
century, and vital in training public speakers and writers. Studying the old Greek and Roman masters, such as Plato, Aristotle, Cicero and Quintilian, would have been an essential part of learning Rhetoric. A lecturer in Rhetoric would have had to be a learned scholar and very well read, as well as an impressive speaker.