The Initiate: Some Impressions of A Great Soul is a combined anthology and parable dealing with the occult, written by the British composer Cyril Scott in the early 1900s.
The author of the book claims to have become friends with Haig and to have found him to be a most remarkable individual—an initiate or adept, in occult terms.
This fictional portion of the book tells the story of Antonius, a wealthy and jaded individual who decides to set aside his life of materialistic pleasures and seek greater occult truths on a journey into the mountains to meet the members of a spiritual Brotherhood, accompanied by a female companion named Cynara.
Today, it is known that Cyril Scott wrote the book, but the true identity of Haig, and indeed the question of his actual existence, remain controversial.
The sequels also reference and sometimes critique occult organizations and persons, such as the Theosophical Society, Jiddu Krishnamurti, and Helena Blavatsky.