A few of the conspirators were concerned about fellow Catholics who would be present at Parliament during the opening.  On the evening of 26 October, Lord Monteagle received an anonymous letter warning him to stay away, and to "retyre youre self into yowre contee whence yow maye expect the event in safti for ... they shall receyve a terrible blowe this parleament".  Despite quickly becoming aware of the letter – informed by one of Monteagle's servants – the conspirators resolved to continue with their plans, as it appeared that it "was clearly thought to be a hoax".  Fawkes checked the undercroft on 30 October, and reported that nothing had been disturbed.  Monteagle's suspicions had been aroused, however, and the letter was shown to King James. The King ordered Sir Thomas Knyvet to conduct a search of the cellars underneath Parliament, which he did in the early hours of 5 November. Fawkes had taken up his station late on the previous night, armed with a slow match and a watch given to him by Percy "becaus he should knowe howe the time went away".  He was found leaving the cellar, shortly after midnight, and arrested. Inside, the barrels of gunpowder were discovered hidden under piles of firewood and coal. 
Before Peter was born, his mother Thelma went to Mexico City to have an abortion.  However, she gave birth during the procedure, and smuggled him home to Providence, Rhode Island, where he spent his childhood.   Peter was raised by Francis and Thelma Griffin in the Roman Catholic faith.  However, in " Peter's Two Dads ", he discovers that his biological father is an Irishman named Mickey McFinnigan.  Peter visits Mickey, who initially rejects him. Mickey later accepts him as his son after beating him in the "game of drink" (the game of drink referring to matching shots until one passes out).  Mickey is based on the friends of MacFarlane's father. MacFarlane said: "When I was growing up, my father had lots of friends: big, vocal, opinionated New England, Irish Catholics. They were all bursting at the seams with personality, and Family Guy came out of a lot of those archetypes that I spent years observing."