Hygromanteia, or The Magical Treatise of Solomon (MS Bononiensis Univers. 3632) is a 15th century grimoire with instructions on divination, the uses of plants and herbs, and astrology, as well as principals of magic. It is the source material for the Key of Solomon.
The list of spirits and spells provided here are currently incomplete.
The grimoire Grimorium Verum draws upon this grimoire.
This grimoire influenced the grimoire Key of Solomon
This grimoire is in the tradition of Solomon