- male, deceased (1925)
- Lieutenant Sidney George Reilly, MC (c. March 24, 1873? - November 5, 1925), famously known as the "Ace of Spies", was a Russian-born adventurer...
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- male, deceased (1918)
- William Melville (April 25 1850 - February 1 1918) was an Irish law enforcement officer and the first chief of the British Secret Service,...
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- male, deceased (1923)
- Captain Sir George Mansfield Smith-Cumming, KCMG, CB (1 April 1859 – 14 June 1923) was the first director of what would become the Secret In...
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- male, deceased (1941)
- Robert Stephenson Smyth Baden-Powell, 1st Baron Baden-Powell OM, GCMG, GCVO, KCB (22 February 1857 - 8 January 1941), also known as B-P, was a...
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- male, deceased (1947)
- Lieutenant Colonel Sir Claude Edward Marjoribanks Dansey (1876-1947), also known as Colonel Z, was the deputy chief of the Secret Intelligence... More
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