London (CNN)Most of the time, visiting a foreign city and bringing back a pen as a gift won't go down well with the recipient.
But that tactic may have older roots than we thought; archaeologists have discovered an iron stylus in London, complete with an inscribed joke, that dates back nearly 2,000 years.
Of 200 styluses found at a site under Bloomberg's new European headquarters, only one -- dating back to around 70 A.D. -- had a message inscribed onto it.
