Article highlights:
- targeting the demons
- an exorcist from Spain
- closed-door ritual
- Great Exorcism
- exorcist and demonologist
- the ceremony
- rite of exorcism, beautiful and liturgical
- did not give details of the ceremony
- designed around the four cardinal directions
- distinct prayers, chants and names of saints said for North, South, East and West
- includes a section concerning the Door to the Abyss in which one of the participants hits the ground with a ceremonial hammer between calls for the Virgin Mary to close the entrance to Hell and keep the Ancient Snake away
Actually, the last 3 points are assumed by the author of the article. No one knows what the liturgical method used was, except for those closely involved.