The Magus or Celestial Intelligencer is an handbook of
the occult and ceremonial magic published in 1801 written by Francis Barrett.
Most of the content comes from Agrippa’s three books of Occult Philosophy and Pietro D’Abano’s Heptameron. Inside there are many information about summoning
demons and he gives his own take on the demonic hierarchy, naming eight demonic
princes and attributing to them power over some evil concept or group of
people.
Mammon: seducers
Asmodeus: vile revenges
Satan: witches and warlocks
Pithius: liars and liar spirits
Belial: fraud and injustice
Merihem: pestilence and spirits that cause pestilence
Abaddon: war, evil against God
Astaroth: inquisitors and accusers
Image: Illustration of Cassiel from The Magus by Francis Barrett