A 1604 Fawkes ya shiga tare da karamin rukuni na Katolika na Ingilishi, wanda Robert Catesby ya jagoranci, wanda ya shirya ya kashe Protestant King James kuma ya maye gurbinsa da 'yarsa, na uku a layin gadon sarauta, Gimbiya Elizabeth. Lokacin da firist na Jesuit da tsohon abokin makaranta Oswald Tesimond suka bayyana Fawkes a matsayin "mai dadi na kusanci da kuma farin ciki, yana adawa da jayayya da rikici... mai aminci ga abokansa". Tesimond kuma ya yi iƙirarin cewa Fawkes "mutum ne mai ƙwarewa a cikin al'amuran yaƙi", kuma wannan cakuda ne na ibada da ƙwarewa da ya sa ya zama ƙaunataccen abokansa. Marubucin Antonia Fraser ya bayyana Fawkes a matsayin "mutum mai ƙarfi, mai tsayi, mai gashi mai launin ja, mai gashin gashi a cikin al'adar zamanin da, kuma ya maye gurbinsa da 'yarsa, Gimbiya Elizabeth Elizabeth.
Afrilu na shekara ta 1604