The adventures of a modern occultist

In Short

This work serves as a practical, often grim guidebook for the modern student of psychic phenomena. Rather than offering spiritual comfort, it treats occultism as an experimental science, detailing the author’s investigations into spirit possession, hauntings, and the mechanics of ritual magic. Through a mix of personal narrative and technical analysis, it argues that psychic phenomena—often mistaken for divine communication—are actually dangerous, material interactions involving "psychoplasm" and hypnotic suggestion. It remains a fascinating artifact of the early twentieth-century obsession with bridging the gap between scientific rationalism and the unseen world.

The Story

The narrative functions as a series of case reports drawn from the author’s personal journals, presenting a world where the supernatural is a persistent, tangible, and often malevolent force. The journey begins in the parlors of London, where the author acts as a professional mediator in spiritualist circles. He is frequently called upon to intervene when séances go wrong—when, for instance, a medium is overcome by a hostile spirit or a circle is threatened by the psychic fallout of a vengeful ghost. In one particularly harrowing account, he guides a man named Carthew through a confrontation with the spirit of a former tormentor, Tregarthen. By orchestrating a ritual of exorcism and utilizing his own command over "psychic energies," the author forces the spirit to retreat, effectively shielding the living from the dead.

As the accounts progress, the focus shifts from simple spirit communication to the darker, more obscure practices of ritual magic. The author travels to meet fellow practitioners, such as Carrier in a decaying Parisian garret, to discuss the practical application of "working formulæ"—simplified rituals that strip away religious ornamentation in favor of direct, mechanical results. He delves into the history of these practices, tracing them from ancient Egyptian incenses to the brutal, drug-induced trances of the "Assassins" in the Lebanon mountains. Throughout these explorations, the author remains skeptical of the "good" intentions often attributed to the occult. He views the spirit world as a realm of latent danger, where the "mental promiscuity" of a séance circle can inadvertently invite something cruel or obscene.

The final arc of the book moves into the realm of the physical, exploring haunted houses, "fire-walking" phenomena, and the use of scientific instruments—like his own "psycho-lastrometer"—to measure the fluctuations of psychic radiation. He details a haunting in a derelict mansion and investigates the mysterious "owl-blasting" of trees in the Welsh countryside, always looking for a material cause for the supernatural effect. He concludes that the occult is not a matter of faith, but a study of the subconscious mind and the manipulation of unseen forces. The experience ends with a stern warning against the "fakirs" and "swamis" who exploit the gullible, and a reaffirmation that, whether through the lens of a scientist or an occultist, both seekers are merely trying to map the vast, unknown machinery of existence.

How It Unfolds

The medium’s intervention The narrative opens in a controlled séance where the author intervenes to manage a volatile spirit manifestation. He must quickly shift from observer to exorcist when a hostile entity refuses to leave the circle.

The practitioner’s study The author ventures into the cluttered, impoverished rooms of other occultists to compare notes on ancient rituals. They dissect old manuscripts, seeking to reduce complex magical formulas to their most efficient, mechanical components.

The danger of circles The author provides a sobering analysis of why spiritualist circles often fail, citing the hidden "mental kinks" of participants as a catalyst for disaster. He argues that human desire and repressed emotion act as a magnet for undesirable spirits.

The hauntings of the past The text shifts to the physical exploration of a desolate, derelict mansion where a powerful presence is trapped. The author describes the oppressive atmosphere of the site and the specific limits of the haunting’s reach.

The mechanism of magic The author explains the link between ancient drug-laden incense and the modern understanding of hypnotism. He argues that the "master of the Assassins" was essentially a skilled hypnotist, using chemical and psychological tools to control his followers.

The scientific record The book concludes by advocating for the use of electrical and chemical instruments to track psychic phenomena. By applying rigorous measurement, the author believes he can strip away the illusions of the charlatan and reveal the reality of the astral world.

The People

The author serves as the cold, rational center of the book. He views himself as a man of science, possessing "unusual gifts" that allow him to perceive and control forces others only fear. He is wary of the "vulgar" and the "charlatan," acting as a gatekeeper who believes that power must be handled with precise, clinical caution.

Carthew is the desperate seeker whose life is upended by a haunting. He represents the danger of emotional vulnerability in the occult; his pent-up hatred of the deceased Tregarthen nearly destroys him until the author steps in to turn that hatred into a weapon for exorcism.

Carrier is a fellow practitioner living in a squalid Paris apartment. He acts as a foil to the author, a scholarly peer who focuses on the textual history of magic, helping the author refine the theory that rituals are merely tools—"working formulæ"—meant to be stripped of their religious or symbolic excess.

The "mediums" and "controls" are largely treated as instruments or, at times, liabilities. When they fail, it is usually because they are undisciplined or have allowed their own "secret kinks" to taint the psychic atmosphere, transforming them from conduits into conduits for the obscene or the cruel.

In Its Own Voice

"There are in this book certain disclosures of hidden facts which are given to the world simply because the time is ripe when they should be more fully known and their revelation is counselled by wisdom."

The author explains his motivation for publishing, casting his work as a necessary, if dangerous, unveiling of occult truths.

"I had no need to prompt him to go on; he laced into his ghostly antagonist as if he had the earthly body there in front of him."

The author describes the intense moment of exorcism where he directs the victim to weaponize his own hatred against a possessing spirit.

What It's Really About

The book is a sustained argument for the demystification of the occult. It contends that what we call "magic" or "spiritism" is actually a manifestation of the subconscious—a "psychoplasm" that obeys laws as rigorous as those of chemistry or physics. The author is deeply preoccupied with the danger of human subjectivity; he argues that the occult is not a moral or divine realm but a treacherous, highly reactive environment. Beneath the anecdotes of ghosts and exorcisms lies a profound anxiety about the instability of the human mind. The ultimate question is whether mankind can safely harness these "unknown forces" without being consumed by the very darkness or repressed desires they seek to command.

Why Read It Today

Readers interested in the history of psychic research will find this a bracingly unsentimental read. Unlike the gauzy, ethereal accounts of many Victorian spiritualists, this book feels cold, tactile, and intensely practical. It is written with a precise, clinical warmth that makes its descriptions of "corpse-grey plaster" and "leperous strips" of wallpaper feel strikingly immediate.

However, the modern reader should be prepared for the author’s rigid, often elitist worldview. His dismissal of "Eastern" practices as inherently inferior or fraudulent reflects the common prejudices of his time, and his insistence on the dangers of "mental promiscuity" occasionally leans into reactionary moralizing. The prose is dense with technical jargon—references to N-rays, selenium cells, and Martinist rituals—which can be demanding, though the narrative segments are fast-paced and lean. You will stay with the book if you are fascinated by the intersection of early science and occult obsession. It leaves a lingering sense of unease, not because of the ghosts themselves, but because of the author’s frighteningly casual assertion that the line between a man’s mind and the "monstrous" is thinner than we dare to imagine. It is a work for those who prefer their supernatural thrills tempered by a sharp, observant, and occasionally ruthless analytical mind.