THE COSTLY MISTAKE

Something In The Water

I found the pattern on the ninth day, and I almost missed it.

Wasting fevers don’t usually move in straight lines. They spread through contact, through shared air in close quarters, through the slow accumulation of exposure that makes tracking an outbreak’s path a matter of probability rather than certainty. I’d treated enough of them to know the shape a natural outbreak takes — clustered around families, around the sickroom itself, around anyone who’d nursed an early case before we understood what we were dealing with.

This one didn’t have that shape. It had a line.

I spent an evening I should have spent sleeping instead mapping every case against the territory’s geography, using a rough chart Roman’s household kept for tax purposes, and the line that emerged ran along a single stream — the same stream that fed three of the territory’s outlying farms and, further downhill, the well that served Millrow’s western quarter.

I didn’t sleep that night at all. I spent it instead comparing water sources against the timeline of each case, and by dawn I had something I needed Roman to see immediately, whatever the state of our five-year silence.

He was in the training yard when I found him, overseeing a rotation of the border watch with the same controlled focus he brought to everything, and I didn’t wait for a convenient pause in his morning.

“I need ten minutes.”

“I’m occupied.”

“You’re going to want to hear this before you decide that.” I held up the chart, ink still smudged from a night of revision. “The sickness isn’t spreading the way a natural outbreak spreads, Roman. It’s following a water source. Every case I’ve mapped traces back to the same stream.”

That got his attention. He dismissed the watch rotation with a short gesture and led me to a quieter corner of the yard, studying the chart with the same weighing intensity I remembered from years ago, back when he still let me see him think through a problem instead of simply issuing conclusions.

“You’re saying someone poisoned the water.”

“I’m saying it’s possible. I can’t prove intent yet, only pattern. But natural contamination doesn’t usually concentrate this cleanly along a single source, especially not one that feeds farms and a residential well both. Something’s getting into that stream upstream of all of it, and it’s either an extraordinarily unlucky coincidence or—”

“Or someone wants my border territories too sick to defend themselves.” His voice had gone low, dangerous, and I watched him do the same mental arithmetic I’d been doing all night — the timing of the outbreak, the timing of Blackwood’s scouting, a border weakened from the inside at exactly the moment a rival pack started testing its edges. “Show me the source point.”

We rode out within the hour, just the two of us, which felt like its own small collision after five years of careful distance — close enough on the trail that our horses occasionally brushed shoulder to shoulder, close enough that I was uncomfortably aware of him in a way that had nothing to do with the crisis at hand.

The source point, when we found it, told its own story. A narrow tributary feeding into the main stream, and along its bank, buried imperfectly enough that a careful eye could find it, the remains of something that didn’t belong there — a rotted sack, chemical residue staining the rocks around it in a way no natural process would produce.

Roman crouched beside it a long moment, jaw set, saying nothing.

“This wasn’t an accident,” he said, finally.

“No.”

“Which means someone with access to my territory’s interior — not a Blackwood scout, someone who knows this land well enough to find an upstream point nobody patrols — has been deliberately poisoning my own people.” He stood, and the fury in his expression had shifted into something colder, more focused, the specific quiet of a man recalculating exactly who around him he could still trust. “I need a list. Everyone who’s had unsupervised access to this stretch of territory in the last month.”

“Roman.” I said his name carefully, watching something in his expression that worried me more than the poison itself. “If it’s someone close to you—”

“I know what I’m implying.” He looked at me directly then, and for the first time since that first devastating reunion in the sickroom, something in his gaze softened into an expression I remembered from a life we’d both lost. “I don’t want to believe it either. But I’ve learned, the hard way, exactly how much damage someone I trusted can do when I refuse to look at the evidence in front of me.”

I didn’t ask what he meant by that. Some instinct told me the answer was closer to the truth of five years ago than either of us was ready to examine standing at a poisoned streambank, and I let the silence hold instead, watching him stare down at the evidence of a betrayal neither of us yet understood the full shape of.

We rode back to the Hold in a quiet that felt, for the first time since my arrival, less like hostility and more like two people bracing together for something worse than either of them had expected to face.