A/N: If you are reading this through an unauthorized repost, this upload is not authorized by me. The Mudblood Alchemist [Victorian Era|Harry Potter SI] is my work, published by R. Lockey / R_Lockey, and the official sources are my Royal Road, Webnovel, and AO3 pages. Unauthorized reposts and related monetization have been reported and documented.

  Clara's letter arrived Monday morning, carried by her tawny owl that landed on Rowan's plate and stood on his toast until he took the envelope. Lawrence glanced over from his porridge but didn't ask. He knew the handwriting.

  Rowan opened it at the table. Clara's script was steady on the left side of the page and shakier on the right, where her hand had to cross the midline. She wrote with her left now.

  Rowan,

  We sold forty-three luminaires this week. That's the third week running above forty. The Prophet article is still pulling people in and the waiting list has gotten long enough that I've stopped apologising for the delay and started quoting delivery times instead. Two weeks for desk models, three for the wall-mounted design Lawrence drew up before term.

  The apothecary on Horizont Alley placed a standing order for three per month, which is our first wholesale account outside Diagon Alley proper. I've raised the price on the desk models by two Sickles and nobody's complained. More interesting: we received an owl last Tuesday from a woman in Paris who runs a magical household goods shop near Place Cachée. She'd read about the luminaires in a French translation of the Prophet article and wants to know if we ship internationally. I told her I'd write back once I'd spoken with you. There was also an inquiry from a wizard in Brussels, though that one was vaguer.

  Eleanor is settling in. She's faster than me at the inscription work, which I'm choosing to find useful rather than insulting. She burned through a crucible last Tuesday by leaving the athanor unattended during the dissolution stage, which cost us a day's production and a lecture from me about process discipline. She took the lecture well. She reminds me of myself at that age, which is probably why I hired her. Even with Eleanor running the press at full capacity we can barely keep up. I'm thinking about whether we need a third pair of hands, though finding another muggleborn with the right skills who'll sign a contract isn't straightforward.

  The wards held through a thunderstorm on Thursday. Whatever the goblins built into the wardstone, it doesn't mind weather.

  My hands are the same. Some days better, some days worse. I've started doing the exercises the Healer recommended, though I can't tell yet if they're helping or if I'm just getting used to the limitations. I can hold a teacup now if I use both hands, which feels like progress and also feels like something a woman my age shouldn't have to celebrate.

  Don't worry about me. Worry about your studies. And eat properly.

  Clara

  Rowan folded the letter and put it in his pocket.

  "How is she?" Lawrence asked.

  Rowan handed him the letter. Lawrence read it quickly, his eyes catching on the same lines Rowan's had. He turned the page over as though there might be more on the back, and Rowan knew what he was looking for.

  "Her hands," Lawrence said.

  "The same."

  Lawrence handed the letter back and went back to his porridge. His jaw was set in a way that had nothing to do with breakfast. They had the moonstone. They had the other components. The new moon was nine days away.

  After breakfast Rowan climbed the spiral staircase to Mole's office.

  She was marking student essays and didn't look pleased about it. She set her quill down when he came in and pushed the stack aside with the air of someone grateful for an interruption.

  "Mr. Ashcroft."

  "Headmistress. I need to ask for something that's going to require some explanation."

  "That's rarely a good way to start a conversation in this office. Sit down."

  He sat. Mole responded best to directness. She didn't like being managed.

  "I need to bring Clara Goode to the castle. Lawrence's mother. I've found a way to heal the Cruciatus damage, but I need your permission to do it here."

  Mole's expression didn't change but her eyes sharpened. "What kind of healing?"

  "A ritual."

  The room went very still. Mole set her quill down slowly.

  "Ritual magic is classified as dark magic under Ministry law. The same classification as the Unforgivable Curses." Her voice was level but her eyes were hard. "You're asking me to permit what the Ministry considers a dark magic offence inside Hogwarts. The answer is no."

  Rowan had expected this.

  "Clara was tortured with the Cruciatus until her magical pathways ruptured. St Mungo's spent three months treating her and told her the damage is permanent. There is no healing spell for this. She can't hold a wand. She can barely hold a teacup." He kept his voice level. "The ritual classification was pushed through the Wizengamot a century ago to keep the knowledge out of common hands. The Flamels told me as much. Most of the Continent never adopted the ban. The classification is political, and Clara's hands shake every day because of it."

  Mole was quiet for a long time. Her fingers found the quill and turned it once, slowly. Rowan could see her weighing the Flamels' name against the Ministry's classification, and which one carried more weight in the room they were sitting in.

  "You realise that if the Flamels are wrong about this procedure, or if your execution is less than perfect, I'm the one answering for it."

  "I know."

  "Where would you perform it?"

  "There's a room on the seventh floor that can provide the controlled environment the ritual needs."

  "The Room of Requirement."

  That surprised him.

  "I was a student here once, Mr. Ashcroft." She set the quill down. "Who else knows?"

  "Lawrence and Iris."

  "It stays that way. I'll have Madam Blainey present for medical oversight. She's discreet and she knows when to keep things out of her records. Nobody else." She met his eyes. "If word reaches the Ministry that I allowed this, I will deny everything, and you will not contradict me. Are we clear?"

  "Yes, Headmistress."

  "Mrs. Goode may Floo to my office on the evening of the new moon. I'll bring her to the seventh floor myself." She pulled the essay stack back toward her. "Bring me the ritual manual by tomorrow morning. I want to read it before I let this happen in my castle."

  Rowan wrote two letters that evening. The first was to Clara.

  Clara,

  Your business decisions are sound. The wholesale account is good news and the price increase was overdue. Tell Eleanor the dissolution stage is unforgiving and she should set an alarm charm on the athanor if she can't stand over it the whole time. Lawrence says to write the temperature protocol on the wall above the station.

  Stolen content alert: this content belongs on Royal Road. Report any occurrences.

  Write back to the woman in Paris. Tell her we can ship internationally but we'll need to work out the logistics and pricing for bulk orders. Get her name and what she's looking for. If there's enough demand from the continent, we should think about whether it makes more sense to open a second location near the French market rather than shipping everything from London. I'll be with the Flamels this summer and Paris is close.

  If you need a third person, hire one. Use the same contract terms as Eleanor. The production bottleneck will only get worse.

  I need you to come to Hogwarts. Lawrence and I have found what we've been looking for, and we're ready to try a healing ritual I've been researching since last year. The Headmistress has given provisional permission. The new moon is in nine days. You'll Floo to her office and she'll bring you to where we'll be working.

  I know you'll say you're fine and the exercises are helping and I should focus on school. I'm asking you to come anyway.

  Rowan

  The second letter went to the Flamels. He included Iris's careful sketches of the cave runes, his own annotations, and a description of the mountain structure and its location relative to the centaur territory. He asked whether the pre-Futhark symbols matched anything in their collection. He also described the structure itself, how the magic was embedded in the stone without any runic inscription at all, and asked whether they knew of a wizarding tradition that worked that way. He'd watched Vorzak forge the goblin wards on the shop last summer and the principle was similar, magic built into the material rather than layered over it, but the construction looked nothing like goblin metalwork. Whatever tradition had built it was something else entirely. He sealed both letters and sent them with his owl, who was still new enough that the trip to Devon and back would be a test of whether he could find the Flamels' house on his own.

  The week passed. Mole returned the ritual manual on Wednesday with a note in her precise handwriting: I've read it. Don't make me regret this. She confirmed Clara's visit for the evening of the new moon. Lawrence spent every free hour in the Room of Requirement preparing the moonstone, separating it from the surrounding feldspar with a jeweller's loupe and fine chisels. The Room provided a workbench and steady light and the privacy to work without questions. Iris helped when she could, holding lights and cleaning fragments while Lawrence carved with the care of someone handling something that couldn't be replaced.

  Clara arrived on the evening of the new moon, stepping out of Mole's fireplace in travelling robes with her hair pinned back and her hands buried in her pockets. Lawrence was already there. He hadn't spoken more than ten words all day.

  Mole led them to the seventh floor. Rowan paced three times and the door appeared. Clara watched it materialise and said nothing. She looked at the door, then at Lawrence, then at Rowan.

  "Let's get started," she said.

  Blainey was waiting inside. The Room had configured itself as a ritual space: a cleared stone floor with silver guidelines already etched into the surface, a preparation table along one wall, and candles floating in a precise circle. The air was still and warm and the ambient magic hummed at a low, steady frequency.

  A/N: If you are reading this through an unauthorized repost, this upload is not authorized by me. The Mudblood Alchemist [Victorian Era | Harry Potter SI] is my work, published by R. Lockey / R_Lockey, and the official sources are my Royal Road page and my Webnovel account. Unauthorized reposts and related monetization have been reported and documented.

  Rowan had spent three hours that afternoon inscribing the ritual circle. Silver ink on stone, each rune drawn from the manual's specifications, each line measured twice. Lawrence had checked his work. Iris had checked Lawrence's checks. The circle was correct.

  Clara stood in the doorway and looked at the room and then at her son and then at Rowan.

  "You really think this will work."

  "Yes."

  "Lawrence," Clara said.

  "It'll work, Mum." Lawrence's voice was rough and very quiet. "Please."

  Clara took her hands out of her pockets. They shook. She looked at them for a moment and then walked into the circle.

  The ritual took forty minutes. Rowan directed it from outside the circle, reading from the manual at first and then from memory as the procedure became mechanical. The moonstone, ground to a fine powder, was mixed with the powdered silver and dissolved in the spring water to create a luminous suspension that Clara drank. The liquid tasted of nothing, she said. The effect was immediate but subtle. A warmth that spread from her stomach outward, following the lines of her body, and wherever it reached, the shaking eased.

  The circle's runes activated in sequence as Rowan fed magic into them. Silver light rose from the inscribed lines and wrapped around Clara in a slow spiral. She closed her eyes. Lawrence watched from the edge of the room with his fists balled at his sides and his face rigid and Iris stood beside him with her hand on his arm.

  Blainey monitored Clara's vitals throughout, her diagnostic charm casting a faint blue glow that overlapped with the silver of the ritual. She said nothing. Her expression was focused and professional and gave nothing away.

  The light peaked. Clara's hands, which had been shaking visibly when she entered the circle, went still. Completely still. The tremor that had lived in her fingers since the attack was gone.

  Then the light faded and the runes dimmed and the Room was quiet.

  Clara opened her eyes. She looked at her hands. She turned them over, spread her fingers, closed them into fists and opened them again.

  She picked up her wand from the preparation table where she'd left it. Her right hand closed around it without hesitation, the grip firm, the fingers steady.

  "Lumos," she said.

  The light that came from her wand was small and ordinary and it was the most important spell Rowan had ever watched someone cast.

  Lawrence made a sound that Rowan had never heard from him before. It came from somewhere deep in his chest and it wasn't crying exactly but it was close enough that Iris tightened her grip on his arm and turned her face away to give him a scrap of privacy.

  Blainey ran her diagnostic charm one more time. She looked at the results for a long while and then looked at Rowan and didn't say anything. She didn't need to. The readout said it for her.

  Mole, who had been standing by the door throughout, crossed the room and examined Blainey's diagnostic readout. She was quiet for a long time.

  "Mr. Ashcroft," she said finally. "You continue to be the most difficult student I have ever had the privilege of teaching."

  Clara hugged Lawrence. He let her. His shoulders were shaking and he'd buried his face against her neck and he wasn't trying to hide it and Rowan looked away because some things weren't meant to be watched.

  After Clara left, escorted back to the fireplace by Mole, the three of them sat in the Room of Requirement. The ritual circle was fading on the floor, the silver ink losing its glow. The candles had guttered.

  Rowan reached into his bag and set two cloth-wrapped parcels on the preparation table.

  "There was enough moonstone for three doses," he said. "Clara's ritual used the largest piece. These are for you two."

  Iris looked at the parcels. "Rowan."

  He pushed the parcels across the table. "My core already expanded last year. These are yours."

  Lawrence picked up one of the parcels. He turned it over in his hands the same way he'd turned his mother's letter the week before. He looked at Iris. Iris looked at Lawrence. Some wordless negotiation passed between them.

  "All right," Iris said. "But the next time you decide to give away something this valuable, you could at least pretend to think about it first."

  They performed the ritual twice more that evening. Rowan directed each one from memory, the procedure now familiar, his hands steady on the preparation table. The silver light rose and fell. Iris went first and came out of the circle looking slightly dazed and said that everything felt louder, as though someone had turned up the volume on her senses. Lawrence went second and said nothing when it was done, just sat against the wall for a while with his eyes closed and his hands open on his knees.

  They walked back to Ravenclaw Tower together. The castle was quiet at this hour, the corridors empty, their footsteps echoing off the stone. Iris was running her fingers along the wall as they walked, feeling the texture of the stone as though she were noticing it for the first time.

  They passed a suit of armour on the fourth-floor landing. One of the decorative ones, a full plate harness with a halberd propped against the wall beside it. Rowan glanced at it the way he always did and kept walking.

  Then he stopped.

  A suit of armour. A steel plate riveted together, held upright by a wooden frame. Mundane materials shaped by mundane hands. No magic in it at all.

  The Ice Knight was made of ice. Frozen water. A physical substance with a melting point, a shattering threshold, and a tensile weaknesses along crystal boundaries. You didn't need magic to break ice. You needed mass and velocity.

  The Knight absorbed magic. Every spell Rowan had thrown had made it stronger. Incendio, Confringo, Stupefy, all of it consumed and converted into more of what the Knight already was.

  But a rock wasn't a spell. A rock was a rock. It had mass and momentum and no magical signature at all. If you threw a rock at the Knight, there would be nothing for it to absorb. Just stone hitting ice.

  Rowan stood in the corridor looking at the suit of armour and thinking about rocks and ice and the difference between a spell and a thrown object, and the shape of the problem that had been sitting in his head for a week rearranged itself into something he could work with.

  "Rowan?" Iris was five steps ahead, looking back at him. "You've stopped again."

  "I know." He looked at the armour for another moment. He wanted to tell her. The shape of it was right there, clear and simple, and the Fidelius sat in his throat like a closed fist.

  "Same thing as last time?" she asked.

  "Yes."

  She studied him for a moment. "You'll figure out how to tell me eventually. Or I'll figure it out myself."

  They walked back to the tower and answered the bronze knocker's riddle and went to bed. Rowan lay in the dark listening to Lawrence breathe, deep and even and peaceful for the first time since August, and thought about rocks.