On the 5th of November 1605, Guy Fawkes plot was discovered, Londoners were encouraged to celebrate the King's escape from assassination by lighting bonfires in the city.
The story became public knowledge and fell into folk law with the Guy Fawkes poem: Remember Remember, the fifth of November:

Remember, remember the Fifth of November,
the Gunpowder Treason and Plot,

I see no reason why Gunpowder Treason should ever be forgot.
Guy Fawkes, t’was his intent to blow up King and Parliament.

Three score barrels were laid below to prove old England’s overthrow;
By God’s mercy he was catch’d with a dark lantern and lighted match.

Holloa boys, holloa boys, let the bells ring.
Holloa boys, holloa boys, God save the King!

Hip hip hoorah!