In the year 743 the synod in Leptines (Leptines is located near Binche in Belgium) spoke out furiously against the excesses in the month of February. Also from the same period dates the phrase: "Whoever in February by a variety of less honorable acts tries to drive out winter is not a Christian, but a pagan." Confession books from around 800 contain more information about how people would dress as an animal or old woman during the festivities in January and February, even though this was a sin with no small penance. Also in Spain, San Isidoro de Sevilla is written complaint in the seventh century that people coming out into the streets disguised in many cases the opposite gender.
What type of books from around 800 contain more information of people's traditions during this period?
Confession