Mrs. Rane's theory had been assembled over four decades from three sources.The first: Kavita herself, in the months before her death in 1987. Kavita had been seventy-four and had lived with the mirror for her entire adult life. She was not superstitious in the conventional sense — she was precise, scientific-minded in the way of someone who had been compelled to understand something unusual and had applied rigor to the understanding. She had told Mrs. Rane, in fragments, across several conversations, what she had worked out.The thing in the mirror needed reflection. Not in the mechanical sense of light bouncing off glass. In the experiential sense: it needed to be looked at by a consciousness that was capable of recognizing itself. A person looking in a mirror and seeing themselves — that specific act of self-recognition — was what it fed on. Not the soul, not the body, not the abstract essence. The act. The moment of I am here looking at myself, I am this particular person, I exist. The thing had no self of its own. It had the capacity to hold and become selves, temporarily, but not to generate one. It needed what it ate. It needed the act of self-recognition."Which is why the small things first," Mrs. Rane had explained to Tanvi and Poorvi at the kitchen table. "The laugh before the joke. The menu-reading. The way you hold your chai. These are the things you do without deciding to do them — they're the map of you, specific to you. When it takes them, it has more of your self-recognition to use. More of the specific Tanvi that looks in the mirror and knows she is Tanvi.""And when it has all of it?" Tanvi said."Then the recognition is complete," Mrs. Rane said. "And it doesn't need you anymore. Because it has enough to generate the recognition itself."The second source: Ramesh, who had, before his speech rhythm was taken, told Mrs. Rane two things. One: that in the moments when it was most active, he had felt not watched but reflected — as if the mirror was not showing him his image but showing him how he thought of himself. The internal image, not the external one. Two: that the one time he had felt it recede, briefly, was when he had been in the flat with someone else. Another person, present, looking at him — not at the mirror, at him. The specific experience of being seen by another person, rather than the self seeing itself.Self-recognition was what it fed on.Being seen by another was different. That it couldn't use.The third source: a text. Mrs. Rane had found it — not a sacred text, not an occult document, but a regional Marathi almanac from the 1940s, printed for agricultural communities, which had in its appendix a section on local beliefs about "shadow-things" — entities associated with reflective surfaces, wells, still water. The description matched. And the almanac's single piece of practical guidance read, in Mrs. Rane's translation from the Marathi: For a shadow-thing that knows you by your own knowing of yourself — let it see itself. In the mirror. Not you. Itself. A thing that has no self cannot survive the seeing of it."You can't look at yourself in the mirror," Tanvi said. "It'll take more from you.""Correct," Mrs. Rane said."And someone else looking at themselves won't work," Poorvi said. "Because it will just learn from them.""Correct," Mrs. Rane said."So we need to get it to look at itself," Tanvi said. "In the mirror.""Yes," Mrs. Rane said. "And it has no face of its own to show it. So we need to find the face it shows when it's not performing someone else's." She paused. "Which means going into the flat when it's hungry and unoccupied. Which means going in when it's been without a person long enough to have lost the shape of the last one." She looked at Tanvi. "And we need to bring a second mirror. A hand mirror, small. So that the flat mirror sees itself." She paused. "When a mirror faces a mirror, the reflections go on forever. Neither is the original. A thing that feeds on the original self-recognition — the genuine one, the conscious one — cannot survive in infinite copies of itself. It will eat itself, recursively, trying to find the original."They looked at her."Will it work?" Poorvi said again."I've thought about it for forty years," Mrs. Rane said. "I think it will work. I know it sounds like something from a film." She looked at Tanvi. "But this whole situation sounds like something from a film. And here we are."