Current Holder: Georgiana Wentworth

Origin: Recovered from the Orphean Society Building, London (Chapter 1)

Physical Description

A tattered 18th-century French volume bound in cracked, oily leather with worm-eaten corners. Heavy with the scent of mildew and tallow. Extensive marginalia in Dr Erasmus Hume’s hand throughout, particularly regarding “sonic modulation and neural attunement” — Hume’s annotations connect the ghoul-cult practices to the Aeternum Choir’s harmonic theories.

Provenance

Recovered from an iron-banded chest beneath the altar in the Ritual Preparation Room on the third floor of the Orphean Society Building during the Chapter 1 London investigation. The original text is attributed to the Comte d’Erlette (François-Honoré Balfour, 1703). This copy is a well-worn French translation with Hume’s scholarly additions.

CoC 7e Tome Statistics

Property	Value
Language	French
Reading Time	2 weeks (full study)
Cthulhu Mythos Gain	+5%
Sanity Loss	1D6
Spells	Enchant Knife, Implant Fear, Shrivelling

(Source: Handout 10, Orphean Society Building)

Campaign Relevance

The Cultes Des Ghoules is primarily a necromantic text — its core subject is the relationship between the living and the dead, the rituals of ghoul-worship, and the methods by which the dead can be commanded or appeased. Hume’s annotations are the campaign-relevant layer: he has mapped ghoul-cult chanting practices onto harmonic theory, drawing connections between the vibrational frequencies used in ghoul-cult rites and the Choir’s own resonance work. Whether these connections are genuine scholarship or Hume’s obsessive pattern-matching is a question the text does not answer.

Known Uses in Play

• Session 4: Stolen from the party’s rooms at Palais Kinsky during the Polizeidirektion search ordered by Vogel.
• Session 10: Recovered from the Polizeidirektion alongside the Liber Ivonis and De Vermiis Mysteriis using Metternich’s writ.
• Chapter 4, Session 4: During the multi-day Nile voyage between Rashid and Cairo, Georgiana completed her full study of the Implant Fear spell from this tome. She has since begun an eight-week study of Contact Ghoul, undertaken in the same stretch of transit time.

Relationships

• Carried by Georgiana Wentworth — In Georgiana's possession as part of the party's Mythos library
• Recovered for Order of St Aelfric — Recovered from the Orphean Society during the London investigation