The first real attempt was not the first attempt.
He spent two nights practicing the pulse on forest creatures — not because the technique was unclear, but because he needed to calibrate what the return felt like before he used it on Lyra, before he put something he did not yet fully understand into contact with his sister's body and tried to interpret what came back.
What came back from the Bark Lizard was dense in the way of very small things that are still complex, and he needed two practice sessions to develop enough fluency in reading it to feel confident that he understood the signal. The lizard's interior was healthy — he confirmed this with the healing sense he had already developed, checking the diagnostic pulse's reading against direct healing perception. They matched. The diagnostic pulse was showing him what was actually there.
Three nights after finding the fragment in the boar's memory, on a night when the household was deeply asleep and Lyra's breathing in the dark had the settled quality of someone not in acute distress, he directed Shadow under her bed.
He extended the diagnostic pulse.
The technique required a different quality of stillness than healing did — not the focused directional attention of healing application but an open receiving quality, a willingness to let the return arrive without trying to anticipate its shape. He had compared it, in his internal vocabulary, to the difference between looking at something and listening for something: one was active and outward-directed, the other was open and inward-facing. He had not been especially practiced at the second mode. He had been practicing it deliberately for three days.
The pulse left Shadow's position beneath the bed and passed upward through the mattress and the blankets and the small body of his sleeping sister with a quality he had not been able to fully predict from his practice sessions: it felt like touching something sacred. This was not a word he would have predicted himself reaching for. He was not, or had not been, a person who reached for the sacred easily. But the interior of a sleeping person — the specific textures of a body working quietly and without awareness on its own maintenance, the small mechanical miracles of function that continued regardless of whether anyone was attending to them — had a quality to it that exceeded the merely biological.
He let himself feel this for precisely as long as it was true. Then he attended to what the return was telling him.
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The return took forty minutes to fully arrive and two days to fully interpret.
This was not slowness on his part — the diagnostic information was dense in the specific way that complex conditions were dense, layered and distributed and requiring cross-referencing between the readings from different areas to assemble a complete picture. He was not a trained diagnostician. He was working without reference materials, without a mentor, without the clinical vocabulary that would have made interpretation faster. He was reading a language he had just taught himself from a single partial observation of someone else speaking it.
He was also, despite all of this, doing it correctly.
He was fairly confident of this by the end of the second day, when the picture had assembled itself with a completeness and internal consistency that seemed unlikely to be the product of misinterpretation. The pieces fit together too well. The distribution of the infection, the specific locations where the concentration was highest, the pattern of scarring that mapped onto the infection's history — it was too coherent to be wrong.
Persistent bronchial infection. Deep-seated, long-established, adapted in the way that chronic infections adapted to their host environment: not maximally aggressive, because maximum aggression got you killed along with the host, but stable, sustainable, maintaining itself in a dynamic balance with Lyra's immune defenses that preserved the infection at the cost of progressive damage to the surrounding tissue.
The damage was not dramatic. In any single year, the deterioration in lung function from the chronic infection was small enough to be within normal variation, explainable by the weather or the season or the quality of nutrition or a dozen other factors that her parents attributed it to. Over a decade, the accumulation would have been significant. Over two decades, given the trajectory and the rate of scarring he had mapped — significant was too gentle a word.
He held the complete picture in his mind and felt, with great precision, what he felt.
Relief, because he knew now. He had gone from suspecting something general and serious to knowing something specific and addressable, and knowing was better than suspecting in the absolute sense that a problem you can define is a problem you can work on.
Anger, briefly, at the fact that Healer Vance had not found this — or had found something like it and not reported it fully to his parents, which would have been the more charitable interpretation if he were inclined toward charitable interpretation, which on this particular subject he was not.
And underneath both of those things, settling as the relief and the anger resolved: the specific quality of determination that came when a long campaign finally had its map.
He knew where the infection was concentrated. He knew the pattern of the scarring. He knew the architecture of the damage. He knew, now, where to point the healing and how finely he needed to calibrate it and what he was trying to accomplish with each nightly session.
He could do this.
Not quickly — quickly was not an option when the changes needed to be gradual enough to avoid raising questions. Not simply — simple was not a word that applied to any part of this problem. But thoroughly, and carefully, and with the kind of patient persistence that had gotten him this far in a body that most people would have considered a significant limitation.
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The treatment protocol he designed had three phases, each building on the previous.
Phase one was stabilization. Not improvement — he was deliberately conservative in his ambitions for the first four weeks, targeting only the most acutely active infection sites identified by the diagnostic scan, reducing the infection's current activity level without attempting to address the structural damage it had already caused. His reasoning: he did not yet fully trust his precision. He had been practicing healing on forest creatures for months, but there was a difference between the tissue of a Bark Lizard and the tissue of his sister, and the consequences of an error were categorically different. He needed to develop calibration for this specific patient before he attempted anything ambitious.
Four weeks of nightly sessions. Shadow beneath the bed. The healing magic extended through their connection in the finest thread Arthur could maintain, directed to the primary infection sites with the delicacy of someone doing extremely fine work under conditions they could not entirely control. The thirty percent loss of potency through the connection was a constant variable — he had been working with it long enough to compensate intuitively, adjusting the output to account for the transmission loss the way a musician adjusted the force of a note to account for the distance to the back of the hall.
The infection's most active sites reduced. He confirmed this with monthly diagnostic pulses — performed at the beginning of each month as a baseline reading against which he tracked progress. The changes in the first month were small enough that he could have been wrong about them if he had less confidence in his diagnostic precision. He chose to have confidence in his diagnostic precision and to treat the small changes as the real data they appeared to be.
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