The hallucination of noticing something, as if you have received the sensory input of it, even though it is not there, such as believing you saw someone at a party even though they were somewhere else. Positive hallucinations can easily be created when a person is hypnotized.
Readers, please enjoy this guest blog post by Sandra Kynes, author of several books, including The Herb Gardener's Essential Guide, Plant Magic, and the new Witches' Encyclopedia of Magical Plants, among many others.
Although a few old books...