Sir John Sinclair was head of the Secret Intelligence Service (MI6) from 1952[1] to 1956.[2]
References
- ↑ Stephen Dorril, MI6: Inside the Covert World of Her Majesty's Secret Intelligence Service, Touchstone, 2002, p.494.
- ↑ Stephen Dorril, MI6: Inside the Covert World of Her Majesty's Secret Intelligence Service, Touchstone, 2002, p.621.