He used green ink. It was "special" green ink.
And that was the least of his eccentricities.
He wore a gold-rimmed monocle and carried a sword-stick.
He told numerous tall tales of heroism to explain his missing
leg, which he lost in car accident. He was known to startle
visitors by sticking his wooden leg with a letter opener or
penknife. He got around the office by placing his wooden leg
on a scooter and used his good leg to push the scooter through
On more than one occasion he traveled to Germany posing as
a German, although he didn't speak a single word of the language.
He collected all the latest gadgets of every description,
from guns to nautical pieces. He collected boats and cars.
He was particularly fond of his Bentley, which he drove through
the city at high speeds, sometimes with his 12-year-old niece
at the wheel.
When he hired people, as often or not he hired them because
they admired a book in his collection or could talk knowledgably
about arcane subjects. Somerset Maugham was just one of his
many famous employees.
His name was Captain Sir George Mansfield Smith-Cumming,
and he was the first head of the modern British Secret Service.
Known as "C" (not M, as in the Ian Fleming books),
his distinctive green ink was the unmistakable mark of his
authority. Both his title and green ink have been used by
every office holder since.