When the British Secret Intelligence Service (SSB) discovered that semen made a good invisible ink, Sir George Mansfield Smith-Cumming noted of his agents that “Every man carries his own stylo”.
Wikipedia Tourism 3
December 28, 2007 by Craig
Category: whatever
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Ewww. Seriously, think about it. What about female spies? What did they use?
Comment by Laura — January 7, 2008 @ 12:46 am