American philosopher Willard Van Orman Quine , Harvard University, Cambridge, Massachusetts, USA, 1990.
Russian-born British political philosopher Sir Isaiah Berlin at home in Piccadilly, London, June 1990.
British philosopher Bernard Williams in Oxford, where he holds the post of White's Professor of Moral Philosophy, 23rd August 1992.
American philosopher Stephen Stich, New York, 19th March 2003. Stich is best known for his work on the philosophy of mind.