The sun had not risen when the Duke knocked.
Jonas had been awake for two hours — the facility documents spread across the writing desk in the order he had determined was most useful, which was not chronological but by information sensitivity, the things he would discuss openly in the leftmost stack, the things he would not in the drawer. He had been working through them with the fountain pen, annotating margins, flagging items for follow-up, the particular focused efficiency of a man who had learned to treat pre-dawn hours as the most productive part of the day because they were the part that no one interrupted.
Someone was interrupting them.
"Come in," he said.
The Duke entered with the ease of a man in his own house who had decided that knocking was a courtesy rather than a requirement, looked at the spread of documents, looked at Jonas, and took the chair near the window with the settled manner of someone who had something to discuss and had decided this was the correct setting for it.
Jonas continued annotating.
"Wallenstein," the Duke said. Not a question. The word had the quality of a conclusion being stated aloud for the purpose of confirmation rather than discovery.
"Almost certainly," Jonas said. He did not look up from the document. "The timing aligns with the mine output becoming visible in the market. They cannot access the product and they cannot access the facility, so they applied pressure through an institutional channel that carries imperial weight." He turned the page. "It is a competent move. The ministry of magic has legitimate interest in an undeveloped rare ability and the treasury has legitimate interest in economically significant technology. Two separate justifications, each defensible independently. Neither requires Wallenstein's fingerprints."
"It is Wallenstein's fingerprints," the Duke said.
"Yes." Jonas made a notation. "But it is also an opportunity."
The Duke looked at him.
"The ministry officials arrived because someone told them there was something here worth seeing." Jonas set down the pen and looked at the document rather than the Duke, the posture of someone thinking out loud rather than presenting. "They have now seen the palace's heating system, the hot and cold water, the indoor plumbing. They sat in a warm room in the middle of winter without a fire burning and had water brought to them through a pipe rather than a bucket." He paused. "Eichorst and Webber go back to Berlin. They have a report to write. What they put in that report is the first official imperial document describing what the steam engine does."
"You want them to write the advertisement," the Duke said.
"I want them to write an accurate account of what they observed, which will function as the advertisement." Jonas picked up the pen. "The empire's mines have been operating at baseline capacity for two hundred years. The officials who manage them know this and have accepted it as a fixed condition. A report from two ministry representatives describing a technology that changed that condition in Bavaria — with figures, with the Duke of Bavaria's endorsement, with the winter heating as a demonstration that the same technology has domestic applications — is worth considerably more than anything I could produce through commercial channels."
The Duke was quiet for a moment. "And the academy."
"Off the table. I'll address it in the meeting."
The Duke looked at him for a long time in the way he looked at things he was assessing at depth. Then his eyes moved to the desk — to the fountain pen that Jonas had set down, the pen that had been in continuous use for months now, the barrel showing the particular wear of an instrument that had become an extension of daily function rather than a novelty. He looked at it with the expression of someone who had been thinking about a specific thing for a specific period of time and had found the correct moment to say it.
"Why don't you sell those," he said.
Jonas looked at the pen.
He had been using it since Jakob had produced the first working prototype — had used it every day since, had replaced two nib assemblies and one barrel seal, had produced approximately four hundred pages of documentation, notation, and correspondence with an instrument that everyone who saw him use it noticed and nobody else in the empire possessed. He had not thought about it as a product. He had thought about it as a tool.
He thought about it as a product now.
The calculation took perhaps four seconds. Scholars. Administrative staff. Clerks managing the empire's vast bureaucratic infrastructure with quills that required constant re-dipping, that produced inconsistent line weight, that could not be carried in a pocket and used immediately without preparation. Every person in the German Empire whose work involved sustained writing was currently doing it with an instrument that was, by any objective assessment, significantly worse than what Jonas was holding.
The market was not a niche. It was everyone who wrote for a living, which in an empire of this size and administrative complexity was a very large number of people.
"I'll set up a production line," he said.
The Duke's expression had the quality of a man who had expected this answer and still found it faintly remarkable how quickly it arrived.
At the tenth hour, Herr Eichorst and Herr Webber were seated at the dining table that had been configured as a conference room — documents cleared, chairs arranged on two sides, a carafe of water on the sideboard alongside a service that a servant had laid with the particular care of a household that understood formal settings.
Jonas arrived precisely at the tenth hour. Not at five past, not at a quarter past, which would have communicated either disorganization or deliberate discourtesy. At the hour, which communicated that he had said the tenth hour and meant it.
He sat across from them without preamble.
"Yesterday," he said, "we wasted considerable time on courtesy, on respect, on the question of how officials of the Reich should address minor nobles of the empire. Topics of the kind that market women argue about in the morning and forget by afternoon." He looked at both of them without particular judgment. "I slept on it and the image that came to me was the Reich's enemies laughing at us. So I suggest we set it aside and use the time we have for something that actually matters."
Eichorst's expression was the expression of a man who had decided overnight that yesterday had not gone the way he intended and that today required a different approach. He nodded once with the controlled dignity of someone accepting a reset without acknowledging that a reset was required.
Webber said nothing. He had the stillness of a man who had been calculating since the previous evening and had arrived at a position.
"The Imperial Academy and the Ministry of Magic," Jonas said. "These are not options I will be pursuing. My situation is what it is and it is what I have chosen for reasons that are not open for negotiation." He kept his voice even, the register of a man closing an item rather than inviting a discussion. "I am noting this at the outset so we do not spend time approaching it from different angles and arriving at the same result."
Eichorst moved in his chair but did not speak. Yesterday's version of Eichorst would have interrupted. Today's version was making different calculations.
"What I can discuss," Jonas continued, "is the supply of steam engines to the empire's mining operations, and their broader applications." He settled back slightly. "You have both been in this palace since yesterday evening. The temperature in this room — the temperature throughout the building — has been consistent since your arrival. No fireplaces burning. No fire mages maintaining a heating circuit." He looked at Webber. "You washed this morning. Hot water, cold water, both available at the tap in your quarters. No servant carrying water up the stairs. No waiting." He paused. "The same machine that increased House Meister's mine output by a factor of fourteen does both of those things. Among others."
Webber's expression had shifted. He was a treasury man — his training was in the assessment of economic value, and he was currently performing that assessment in real time, applying it to the information he had been receiving since his arrival at a palace that was warm and had running hot water in the middle of winter.
"I notice," Jonas added, "that whoever invited you here did not explain these applications. They told you about the mines. They did not tell you about the heating or the plumbing or the domestic efficiency implications." He let this sit for exactly the right duration. "I would invite you to consider why that might be."
The silence in the room had a specific quality after that sentence.
Webber spoke first. "The cost. Per unit. And the volume you can supply."
"The cost per unit, excluding installation, will be discussed with his grace, whose commercial structure this operates through." Jonas looked at him steadily. "What I can offer independent of that discussion is this: one year of free maintenance and repair on any unit supplied to an imperial installation. The technicians who install the unit will train the installation's staff to manage routine maintenance. Your operations will not be dependent on returning to us for every minor issue."
This was a concession he had prepared the previous evening — not a significant one operationally, since the engines were robust enough that first-year maintenance costs were predictable and low, but one that would read on Webber's ledger as a meaningful offset against the purchase cost.
"Volume," Webber said.
"Production takes time. Testing each unit before it leaves the facility is non-negotiable — an engine that fails in a mine shaft creates problems I do not want my name attached to." He looked at Webber. "His grace's remaining installations take priority, as the arrangement that built this facility requires. After those requirements are met, imperial installations will be at the top of the external supply list." He paused. "I would suggest beginning with three pilot installations in the empire's highest-output mines. The comparison data from those three sites will make every subsequent procurement conversation unnecessary, because the numbers will do the arguing."
Webber looked at him for a moment with the expression of a man who had come here expecting to be managing a difficult asset and had found himself in a transaction with a counterparty who understood his own position clearly and had done the preparation. He glanced at Eichorst. Eichorst gave a fractional nod.
"We will convey the proposal to Berlin," Webber said.
"Of course." Jonas rose, which closed the meeting. "I will send a formal summary to your office within the week — specifications, preliminary pricing framework, installation timeline estimates. His grace's commercial office will manage the contractual structure." He looked at both of them. "I appreciate the visit. The opportunity to demonstrate the technology to imperial representatives directly is more useful to everyone than any amount of correspondence."
He left them with the slight, controlled warmth of a man who had achieved what he came to achieve and was prepared to be pleasant about it.
Three days later, in the Imperial Academy's residential quarter in Berlin, Elsa von Meister was in her room at the end of the afternoon session with a fur blanket around her shoulders and the particular dissatisfaction of someone who knew, from recent direct experience, that this was unnecessary.
"What's wrong?" The girl in the chair across from her was Lena Brandt — sixteen years old, red hair, a fire mage from a minor Prussian house whose ability and whose temperament had both been refined by two years of Academy training into something considerably more precise than what she had arrived with. They had become friends in the way that people who are thrown together by institutional circumstance sometimes became friends — through proximity first, through genuine compatibility second, through the discovery that they were both more interested in the world outside their respective backgrounds than those backgrounds had anticipated.
Elsa looked at the fur blanket. "In Munich, the palace was warm. Not from fireplaces. Not from magic." She pulled the blanket tighter. "I should not have to do this. I was not doing this in November."
Lena looked at her. "Magic item?"
"No." Elsa had been thinking about how to describe it since she arrived back in Berlin. The description was not straightforward, because it required explaining something that existed nowhere in the Academy's curriculum and nowhere in Lena's experience. "A machine. It burns coal and produces — I don't fully understand the mechanism, but the output is heat and pressure, and you can use both. The palace had hot water running through pipes in the walls. The floors were warm. The bathing rooms had taps — you turned a handle and water came out, hot or cold, whichever you wanted." She paused. "It ran all winter without stopping. No one maintaining it constantly. No mage's reserves depleted."
Lena looked at her with the expression of someone whose first response is skepticism and whose second response is the recognition that Elsa von Meister was not the kind of person who described things inaccurately. "Who built it?"
"A boy. He's attached to my father's house." Elsa frowned at the blanket. "His name is Jonas. He's fifteen years old and I think he has been awake for most of the past year."
"A mage?"
"Fire-aligned. Blue flame, apparently, though I have never seen him use it." She thought about the breakfast, the papers Jonas had produced from his coat, the way he had answered Griselda's loyalty question with the specific composure of someone who had known the question was coming and had already decided what the truth was. "He doesn't fight like a mage. He thinks like—" She stopped. "I don't know what he thinks like. I've never met anyone who thinks like him."
Lena was quiet for a moment. "And he built something that heats a palace without magic."
"He built several things. The water taps. The heated floors. These are connected to the machine." Elsa looked at the window — Berlin in February, grey and cold, the Academy's courtyard visible below with its dusting of old snow. "He also apparently did something significant to the Bavarian mines, though Father has not shared the details."
"This machine," Lena said. "Could the Academy get one?"
Elsa looked at her. The question was reasonable and the answer was that she did not know, but the question itself was interesting — the specific question of a person who had immediately moved from what is this to how do I get access to it, which was either commercial instinct or the particular intelligence that recognized when something was going to matter.
"I don't know," Elsa said. "But I imagine people will be asking that question."
She pulled the blanket tighter and looked at the grey Berlin sky and thought about warm floors.
Across the academy dormitory, Lena was already composing, in her head, what she would say about it to her family when she wrote home at the end of the week.
And in the Academy's common rooms and dining halls and the training yards where students took their breaks, the conversation that Elsa had started with one person continued its natural journey — the way all interesting information traveled through a community of young people with good memories and active social networks — until by the end of the week, the steam engine had been described, with varying accuracy and escalating elaboration, to approximately sixty people in Berlin who had not previously heard of it.
None of them had been asked to say anything.
None of them could help it.