The Book of Soyga is a grimoire of astrology, magic, angelic hierarchies, and word squares. It fascinated John Dee, and was part of his library.
This grimoire describes the humors Yellow bile Phlegm Blood Black bile
The grimoire Five Books of Mystery mentions this grimoire.
John Dee owned this grimoire.
Timeline of related events
1500
1555
John Dee arrested for casting horoscopes (owned this grimoire)1558
John Dee becomes an advisor to Queen Elizabeth (owned this grimoire)1582
John Dee and Edward Kelley meet (owned this grimoire)1583
John Dee completed his Five Books of Mystery (mentions this grimoire)