ABSTRACT
One of the intriguing bit players in the Cambridge Spy Ring is the nuclear physicist Wilfrid Mann, a colleague of Maclean, Burgess and Philby in the Washington Embassy, who was first named as a Soviet agent, along with Anthony Blunt, in Andrew Boyle’s (1979) The Climate of Treason. Opinion still remains divided on whether Mann, codenamed ‘Basil’, was ever a Russian spy with evidence for and against him. This chapter examines some of this evidence.
