The Mansions of the Moon in the Magus
- Listing of the 28 Mansions of the Moon and their use in electional astrology and magic from Francis Barrett's the Magus.
- http://www.renaissanceastrology.com/mansionslistbarrett.html

The Mystica: Francis Barrett
- A practically unknown author of "The Magus" published in 1801. This was a concise handbook on the occult and magic.
- http://www.themystica.org/mystica/articles/b/barrett_francis.html

The Magus
- The complete text including images.
- http://www.sacred-texts.com/grim/magus/

Francis Barrett
- Author of "The Magus", published in 1801. An introduction to him and a short biography.
- http://www.themystica.com/mystica/articles/b/barrett_francis.html