Mineral-Sensing
The Portable DoorMineral-Sensing is Paul Carpenter’s ability to recognize where mineral deposits lie, even when he encounters them through photographs rather than by examining the ground itself. At J.W. Wells & Co., this instinctive sensitivity is called scrying and made a practical reason for employing him: the firm needs him to identify bauxite deposits. The ability is presented not as a learned technique but as an aptitude Paul already possesses, one whose physical cue and usefulness become clearer as he is asked to work with more landscape images.
Identity and Supernatural Context
Dennis Tanner explains the ability through the firm’s account of goblins and minerals. Goblins live underground, digging extensive tunnels toward the outer layer of the planet’s magma core; their association with minerals gives the company a reason to seek deposits. In Dennis Tanner’s home region of New South Wales, the mineral of particular interest is bauxite. He tells Paul that this is why he hired him, connecting Paul’s unusual perception directly to the company’s mineral-finding work.
Dennis Tanner identifies Paul as a natural scryer after Paul has demonstrated the talent. He assesses Paul’s success rate at ninety per cent, describing it as very good. The figure is the supervisor’s evaluation rather than a measurement method explained in the account, but it establishes that the ability is treated at work as a repeatable skill, not a one-off coincidence. Mineral-Sensing therefore sits at the intersection of supernatural perception and an ordinary commercial task: locating useful deposits from images.
Recognition and Operation
The practical test involves photographs of desert landscapes. Dennis Tanner explains that Paul had looked at photographs of stretches of desert and instinctively known where bauxite was present. Paul had not understood that this was what he was doing; the ability had worked without his consciously identifying either the sensation or its purpose. The revelation recasts a task that might have seemed like examining pictures as a form of mineral detection.
The evidence offers one concrete clue to how the ability feels. When Paul later reaches for another landscape photograph, a familiar tingling begins at his fingertips and runs down to his wrist. He interprets that sensation as indicating a successful find and draws a green circle on the image before moving on. The sequence gives the talent a modest working procedure: the image is presented, the bodily signal arises, and Paul marks the indicated location. No instrument or spoken spell is described as necessary.
The response is not represented as a visual map appearing to Paul, nor does the account specify a distance at which he could detect a deposit in the physical world. What it does establish is image-mediated recognition: aerial landscape prints can serve as the material through which he senses a mineral location. The bodily tingle links the supernatural capacity to a simple office action, the green mark that identifies a promising area for the people using the photographs.
Use at J.W. Wells & Co.
After returning to the J.W. Wells & Co. office, Paul finds Dennis Tanner waiting with a folder of large glossy landscape prints. Tanner instructs him to mark any image that produces the familiar response in green. The folder contains aerial views of desert, and Paul is initially skeptical about the urgency attached to the assignment. The task appears mundane until the tingling returns as he touches a photograph; he marks it, then reaches for the next one.
This renewed response also leads Paul to reconsider an earlier apparent failure. He wonders whether the first batch of photographs had produced no results because there had simply been no deposits for him to find, rather than because his ability had stopped working. The narration presents this as Paul’s explanation, not as a separately confirmed test. The distinction matters: his confidence is developing from experience, but the scope and consistency of the power have not been fully established.
The scene places Mineral-Sensing inside the firm’s working routine rather than apart from it. Paul is not asked to announce a vision or demonstrate a dramatic supernatural effect; he is given a folder and a marker. The discovery that his instinct has commercial value changes the meaning of the pictures and of his own past performance. What seemed to be an inexplicable reaction can be interpreted as useful information about where bauxite lies.
Scope and Narrative Significance
The clearest demonstrated application is locating bauxite in desert landscapes. Dennis Tanner’s description of goblins’ mineral interests supplies the company’s rationale, while Paul’s response to the aerial photographs supplies the human ability the work requires. The evidence does not show Paul locating every kind of mineral, finding deposits without an image, or controlling the sensation on demand in every circumstance. The reported ninety-per-cent success rate suggests reliability, but the unexplained remainder and the uncertain first batch leave room for limits.
Sophie Pettingell provides a neighboring but distinct example of supernatural perception. Dennis Tanner says Professor Theo Van Spee believes Sophie has the potential to be a seer; Sophie responds that she does not want to pursue it. This comparison places Paul’s scrying within a wider field of unusual perceptive abilities without making Mineral-Sensing and seership interchangeable. Paul’s particular talent is tied to mineral locations and to the photographs through which he finds them.
The ability’s narrative importance lies in this change of register: a mysterious sensation becomes legible as a job skill. The sequence moves from Paul’s unconscious success, through Dennis Tanner’s explanation, to a new assignment in which Paul can act on the signal and mark the image. Mineral-Sensing is thus both an instance of the book’s supernatural world and a practical resource for J.W. Wells & Co.; its force comes from the way the extraordinary is folded into routine office work.


