"Spiritualism and Necromancy" is a mid 19th century refutation of spiritualism from the specifically fire and brimstone perspective of the Methodist Church at the time. While some of its content is not entirely accurate (or is spiritually debatable) it is an important piece of then-modern lore on demonology.It is the treatment of spirits, especially those of a purportedly evil nature, that most concerns the occultist with such literature; it makes the claim that spiritualist mediums and clairvoyants are sometimes frauds but at other times do communicate with spirits, but not of the dead but rather from Hell itself- literally, devils and demons.