Related Clues:
- Mystical bookstore section
- Of alchemy, astrology, etc
- Hard to know
- Mysterious old sailor loses head with staff
- Scholar can expect to be keeping secret
- Esoteric old fringe religion, its leader included
- Mysterious to most
- Antonym of ''well-known''
- Secret business, turning up at sect
- Like little-known facts
- Supernatural practices
- Like Hogwarts courses
- Like mystical practices
- Obscure English composer with introduction of vacuous cantata
- Like Hogwarts lore