|“||She kept journals. (...) Yeah. Her spellwork. All of it. Right up until the end.||”|
The journals were written by Rowena MacLeod over the course of her centuries-long life. They chronicled her spellwork and everything she learned about magic over the course of her life, including the various spells she created and used. One spell was the Spirit Resurrection Spell Rowena had been creating to resurrect Mary Winchester. She also used them to write down her various translations of the Book of the Damned.
In O Brother, Where Art Thou?, while translating the Book of the Damned to find a way to speak to Lucifer, Rowena wrote her translations down in one of her journals which she later carried with her into Hell to perform the spell.
In Golden Time, following Rowena's death, Sam travels to her apartment in search of Rowena's magical stash, her journals in particular, to find out how to create a Soul Catcher. The ghost of Eileen Leahy helps Sam find a hidden room where the stash was hidden, saddening Sam with the reminder of his friend. While Sam leafs through one of the journals, a loose page falls out containing the spell Rowena had been creating to resurrect Mary. Sam realizes he could use it to bring back Eileen, but comes into conflict with the Witch Mother and Emily who seek to use the spell to resurrect Jacinda instead. After the witches are dealt with, Sam brings the journals and the rest of Rowena's stash back to the Men of Letters bunker.
In Destiny's Child, when traveling to Hell via spell again, Sam comments that it was the spell from Rowena's journals.
The journals contain all of Rowena's spellwork and magic throughout her life right up until her death and effectively act as her life's work in magic. Though regular journals with no magical properties of their own, the knowledge contained within is extremely valuable given Rowena's long life, vast knowledge and access to spellbooks such as the Book of the Damned and the Black Grimoire. Rowena kept detailed information about each of the spells in the journals, making it possible for someone like Sam Winchester to use the journals as a guide to aid them in casting a spell chronicled in the journal or to cast one without her.
Known information in the books include:
- Translations from the Book of the Damned including information on the Cage Projection and Necromantiorum spells.
- The Sanetur Acre Vulnus spell
- Information on creating a Soul Catcher
- The incomplete Spirit Resurrection Spell
- The Hell Transportation Spell