Walsingham, Sir Francis

Walsingham, Sir Francis ( c. 1530 – 90 )
English politician. From 1573 to 1590 he served as Secretary of State to Queen Elizabeth I . He developed a domestic and foreign spy network that led to the detection of numerous Catholic plots against Elizabeth I and the gathering of intelligence about the Spanish Armada. In 1586 Walsingham uncovered a plot against Elizabeth involving Mary , Queen of Scots; he subsequently exerted his power to have Mary executed.