This is a confession by Guy Fawkes, a member of the failed Gunpowder Plot, to blow up the Houses of Parliament in London, on the 5th of November, 1605.
Fawkes was tortured for some time before his confession, and the damage done to him can be seen in his shaky signatures below. The first is under torture, and the second is eight days after torture:
On the 31st of January, 1606 Fawkes either fell or jumped from the platform where he was supposed to hang, and broke his neck before he could be executed as intended.
Today the 5th is celebrated in Britain with bonfires and fireworks as Guy Fawkes Night.