Francis Walsingham was the first 'spymaster' in the modern sense. His methods anticipated those of MI5 and MI6 and even those of the KGB. He maintained a network of spies across Europe, including double-agents at the highest level in Rome and Spain - the sworn enemies of Queen Elizabeth and her Protestant regime. His entrapment of Mary Queen of Scots is a classic intelligence operation that resulted in her execution. As Robert Hutchinson reveals, his cypher expert's ability to intercept other peoples' secret messages and his brilliant forged letters made him a fearsome champion of the young Elizabeth. Yet even this machiavellian schemer eventually fell foul of Elizabeth as her confidence grew (and judgement faded).