Elizabeth's Spymaster: Francis Walsingham and the Secret War That Saved England By Robert Hutchinson
More than 400 years ago, England's Queen Elizabeth I appointed a single man in charge of both intelligence and security, with input on military strategy, too.
His covert staff covered nearly all of Europe. At his peak, he had 18 secret agents in foreign courts and 53 other spies besides those within Britain. He had many fewer scruples.
"Without torture I know we shall not prevail," Sir Francis Walsingham told his immediate boss. Walsingham was reporting to Elizabeth's chief minister, Lord Burghley, on a conspiracy centred on Mary Queen of Scots, who wanted to be Queen of England, too. (more)