78 BC
Two thousand years of product market fit
The oldest dated graffiti at Pompeii reads "Gaius Pumidius Diphilus was here",
scratched into a wall on 3 October 78 BC. A Varangian guard called Halfdan cut his
name into a marble parapet inside the Hagia Sophia sometime between the ninth and
eleventh centuries. Writing your name on someone else's wall is not a meme anyone
invented. Kilroy is just the version that got the furthest.
1902–1962
A shipyard inspector named James J. Kilroy
He inspected riveted hulls at the Fore River Shipyard in Quincy, Massachusetts. Riveters
were paid by the rivet, and some of them rubbed out the chalk tally so the next shift
would count their work twice. Kilroy started marking his inspections in wax crayon
instead, and signed them.
The war
Interior paint was not a priority
Ships were launched faster than they could be finished, so nobody painted over the
marks. Thousands of servicemen boarded troopships out of Quincy, found a stranger's
name already inside the hull, and started writing it everywhere they landed.
1945
The Potsdam bathroom story
The most repeated Kilroy story says Stalin found "Kilroy was here" in the VIP bathroom
at the Potsdam Conference and asked his aides who Kilroy was. It has never been
confirmed. It is a rumour, and it has outlived most confirmed facts from that summer.
1946
Forty men said it was them
The American Transit Association ran a contest to find the real Kilroy. More than forty
people claimed it. James Kilroy won after shipyard officials and his own riveters backed
up his account.