i believe this link may help you of what you seek:
-->>types of necromancy by tomekeeper..
"necromancy is the art of summoning and encircling the shades of the dead. this may represent 'dead' or atavistic memories, the latent subconscious, sleeping aspects of the mind. one may summon these up through the subconscious to the conscious mind, which can prove very dangerous. this type of necromancy was worked intensely through the writings and art of austin osman spare, which no doubt was the modern aspect which linked a purposeful path between the medieval and modern magickal mind." -Michael Ford in his book, Luciferian Goetia-Book of Howling.