…writing a letter? In what is probably the hidden-writing news story of the year, “The UK spy agency MI6 experimented with using semen as invisible ink“, under the steady hand of department head Mansfield Cumming. “Next time you’re banging out a message, 007, use a pen.”
(As James Bond himself would say, “this stuff writes itself“).
The original story is here, but you’ll probably enjoy reading the comments on Cory Doctorow’s BoingBoing post more, as they basically run through most of the spy-who-loved-me seminal puns you’re ever likely to come across.
Just so you know, this is one of the newspaper-friendly saucy tidbits culled from the just-published MI6: The History of the Secret Intelligence Service 1909-1949 by Keith Jeffery, who is no doubt fully aware that the pen is (indeed) mightier than the sword. 🙂