Madam Pomfrey had told him about splinching in the second week of February, which was the week she had allocated for what she called the high-consequence interventions — the specific category of magical injury that required immediate correct treatment and where incorrect treatment was worse than no treatment at all. It was also around this time the 6th years were learning apparation.
'Splinching occurs when a person attempts to Apparate and the magical transit is incomplete,' she said, in the tone she used for clinical instruction: precise, unornamented, the words chosen for accuracy rather than comfort. 'The result is that a portion of the body fails to complete the journey. In minor cases this is superficial tissue — skin, small amounts of muscle. In severe cases it can involve organs or limbs.'
She was showing him the relevant anatomical diagrams as she spoke, produced from a cabinet he had not previously seen opened, their quality somewhere between medical illustration and magical documentation.
'The treatment priority is threefold,' she continued. 'First, stabilize the affected tissue to prevent further deterioration — the severed portion loses magical coherence rapidly once separated, which accelerates physical breakdown. Second, restore the connection. Not reattach — restore. The distinction is significant. Reattachment is surgical. Restoration is magical, and it works with the body's own coherence rather than against it. Third, address blood loss and shock, which will be present in any splinching beyond the superficial.'
He took notes. He always took notes in these sessions, not because he would not remember — he would, eidetically, every word — but because the act of writing forced a different kind of processing. The note was not for memory. It was for understanding.
'The restoration charm,' she said. 'Watch the wand movement before you attempt it.'
She demonstrated on a prepared sample — not a person, a magical analogue she used for teaching that had the relevant properties without the relevant consequences. The charm had a specific quality he had not encountered before: not the confident authority of a curse or the clean release of a standard Charm, but something more like coaxing, the wand movement persuading rather than directing.
'It works with the body,' he said.
'Yes,' she said. 'Most healing magic does, at the level you're reaching. You stopped being able to impose solutions on the body approximately six weeks ago. Now you have to understand what the body is trying to do and assist it.' She looked at him over the diagram. 'This is the difference between a competent healer and a good one. The competent healer knows the spells. The good one knows why the body needs them.'
He practiced the restoration charm on the analogue until Madam Pomfrey said it was correct, which took forty minutes and required three adjustments to the wand pressure in the final movement. He left the session with the specific quality of someone who had learned something that mattered and was aware that knowing it and having used it in an actual situation were still different things.
He would close that gap himself, as it turned out, sooner than he had planned. He would practice on the students arriving from Apparation practice for the next couple months.
He began the Apparition work in the third week of April, an evening after the final sixth year training session had finished and he had decided he had sufficient practice.
He had prepared for it the way he prepared for everything that carried real risk: thoroughly, in advance, with the specific architecture of someone who had identified the failure modes and had a response to each of them. The theory was in order — he had been working through the relevant texts since March, including the Ministry licensing manual which was publicly available and considerably more detailed than its intended audience of seventeen-year-olds required. The physical preparation was in order. The specific mental discipline that Apparition required — the compression of intention into a single directed moment — was something he had been developing through Occlumency since third year and which he suspected gave him an advantage over the standard learner.
What he did not have was the muscle memory. That could only come from doing it.
He started with short distances.
The Room of Requirements gave him a marked floor — two points, ten feet apart, which he had placed himself. He stood at the first point, held the intention of the second point in his mind with the specific precision the theory required — not the general direction but the exact location, the exact space — and Apparated.
He arrived at the second point with a crack that was loud enough to be genuinely startling in an enclosed space and a sensation that was difficult to describe other than as being compressed through a space smaller than himself at speed. He stood at the second point and waited for the world to resolve back to singular.
It did. He was intact. He was at the second point.
He Apparated back. Another crack. Another resolution.
He spent an hour on ten-foot distances, running it until the disorientation was predictable rather than destabilising, until the crack was his crack rather than something that happened to him. Then he extended to thirty feet. Then to the other end of the Room, which was perhaps eighty feet when the Room was in its standard training configuration.
The crack was consistent. He was working on reducing it.
He had understood from the theory that silent Apparition was not a different technique but a refinement of the same one — the same intention, the same compression, but with the ambient magical noise of the transit managed rather than released. The crack was the release of excess magical energy during the transit. Managing it required not suppressing it — suppressing it produced splinching — but redirecting it back into the coherence of the transit itself, which required a degree of fine control that was the Apparition equivalent of the difference between a spell cast and a spell directed.
He worked on this for two weeks without achieving it.
The crack reduced. From the initial sharp retort to something softer, more contained. But it was still present, still audible, and he was not willing to call it done until it was genuinely silent rather than merely quieter.
The splinching happened on the second Thursday of April, which was not a training day and therefore not a day when anyone was likely to be in the immediate vicinity of the Room of Requirements at ten in the evening.
He had extended the practice distance to the full length of a Hogwarts corridor he had mapped — a stretch of approximately two hundred feet between two fixed points he knew precisely — and had been running it for twenty minutes when the transit failed.
Not catastrophically. A minor splinch — the theory had told him these were the most common, and the theory was correct. A section of skin from his left forearm, perhaps three inches by one, had not completed the journey. He arrived at the destination point, looked at his arm, and looked at his arm, and the cold that went through him was not about the pain. He had known this could happen. Knowing had not prepared him.
He sat down on the corridor floor.
The forearm was bleeding, not heavily — minor splinching rarely produced significant blood loss, which was one of the things that made it the preferred teaching example. The tissue at the edge of the wound had the quality he had been shown in the analogue session: the beginning of the deterioration that happened when separated tissue lost magical coherence.
He had perhaps six minutes before the window for clean restoration closed.
He did not go to Madam Pomfrey. He had considered this in advance — had considered it as the obvious response and had decided, weeks before this moment arrived, that the more useful response was to treat it himself, because the point of the preparation was not to have someone else available but to be sufficient himself when no one else was.
He applied the stabilising charm first. The bleeding slowed. The deterioration at the tissue edge stopped.
Then the restoration charm.
He had practiced it on an analogue. He had not practiced it on himself, on his own left arm, at ten in the evening in a corridor without the professional context of the hospital wing around him. The specific challenge was the angle — his wand in his right hand, the wound on his left forearm, the persuading motion that required a specific wrist rotation that was harder at this angle than at the demonstration angle.
He adjusted his grip. He ran the charm.
It worked on the second attempt. Not perfectly — there would be a mark, Madam Pomfrey had told him that minor splinching left marks that faded over weeks — but the restoration was complete, the tissue coheered, the wound closed. He sat on the corridor floor for another three minutes letting his heart do what it was doing and then stood up and checked the work with a diagnostic spell.
Clean. Complete. His arm was his arm.
He walked back to Gryffindor Tower with the specific quality of someone who had done a difficult thing and had arrived at the other side of it intact.
He told Hermione the next morning.
She held the information for a moment with the quality of someone who was deciding between several responses and had identified the most useful one. Then she said: 'Show me the restoration charm. I want to know I could do it if I needed to.'
He showed her. She had it in twenty minutes.
'Don't splinch yourself,' he said.
'I wasn't planning to,' she said. 'But if you do it again I want to be able to help.'
He looked at her.
'You were going to do it yourself,' she said. 'I know. I understand why. But if I'm there, let me help.'
'Yes,' he said. 'Alright.'
The silent Apparition arrived on the last day of April.
It did not arrive with announcement. He had been working on the energy redirection for three weeks, running the technique in incremental adjustments, each attempt slightly quieter than the last but still present, still audible if you were in the same room. He had started to wonder if silent was a theoretical endpoint that he was approaching asymptotically — getting closer without ever arriving.
Then on the day, running the corridor distance at half past nine in the evening, he redirected the transit energy and stepped from one point to the other and was simply there. No crack. No sound. The corridor was as quiet after as before.
He stood at the destination point and waited.
The world resolved. He was intact. He was where he intended to be.
He Apparated back. Silent.
He ran it six more times to confirm it was not an accident.
It was not an accident. The technique had settled — the specific quality of a thing that had been practiced past the point of conscious management and had become simply the way the thing was done. He could feel the difference between the silent version and the audible version the way he could feel the difference between a spell cast carefully and a spell cast correctly: the one was effort, the other was the absence of unnecessary effort.
He extended the practice to the grounds the following week. The distance from the castle to Hogsmeade was approximately half a mile. He ran it in the early mornings before breakfast, crossing the boundary of the Hogwarts wards at the point he had identified as the lowest-resistance exit — not a gap, not a flaw, but the natural point where the ward's density was thinnest by design, built in for maintenance access and documented in the ward records he had found in the library in third year.
Half a mile, silent. He arrived in Hogsmeade at six fifteen on a Wednesday morning and stood in the empty street with the April cold around him and the castle visible up the hill behind him and thought: this is what preparation feels like when it becomes capability.
He Apparated back in time for breakfast.