Updated Mar 23, 2026 • ~8 min read
Chapter 3: What Marco’s face does
CAMILA
Marco’s tell was his left hand.
She’d identified it on day two, during the southern sector survey. She’d asked him about the grid pattern on the monitoring camera placement — why the southwest quadrant had a denser array than the northwest, which had equal canopy coverage and comparable game trail density — and he’d said: *Director Silva designed the grid, I’d have to check the protocol notes* and simultaneously pushed his thumbnail into the pad of his index finger in the specific way of someone saying something that was technically accurate and containing something they weren’t saying.
It wasn’t a lie. She’d noticed that too: Marco didn’t lie. Whatever he wasn’t saying, he wasn’t lying about it. He was answering the narrowest version of the question and being physically uncomfortable while he did it.
She noted: *not lying. Containing.*
The southern sector was extraordinary.
She’d expected good survey data — the facility’s camera array was better than most stations she’d worked at, and the equipment had told her the monitoring was serious. What she hadn’t expected was the specific quality of the territory itself. She’d surveyed jaguar range across six regions of the Amazon basin and she knew what a healthy territory looked like: good canopy cover, adequate prey density, water access distributed across the range. This territory had all of that and something else that she didn’t have a term for yet. The ecosystem felt — managed was the wrong word. The distribution of prey species was too even. The water access points were too well-maintained. The game trails were too clear.
She photographed everything and said nothing and watched Marco’s left hand.
At the mid-morning rest, she asked him about the flooding pattern. The southern sector had a specific flood boundary — she’d seen it on the facility map and it matched what she was seeing on the ground — that was unusually consistent with the forest type boundary. Most Amazon flood lines were irregular, determined by terrain and drainage, producing the ragged transitions between flooded and unflooded forest that were characteristic of the wet season. This flood boundary was almost straight.
Marco said: *the watershed here has some unusual characteristics, there’s been a lot of study on it* and pushed his thumbnail into his index finger.
She said: *what kind of study.*
He said: *hydrological, mostly. The water chemistry upstream has some distinctive mineral content.* He’d said this comfortably. No thumbnail. *There’s a 2014 publication from the Universidad Federal — I can find the reference for you.*
She noted: *2014 hydrological study. Comfortable answer. Upstream water chemistry. Northern sector again.*
She said: *thank you, yes, I’d like the reference.*
She watched a female jaguar cross the game trail forty meters ahead of them. The jaguar was large — larger than the regional average for females, which tracked with the population density data she’d been trying to explain. The jaguar moved with the specific quality of an animal that was not afraid of anything in its territory: unhurried, deliberate, not particularly concerned with being observed.
She photographed the jaguar. She measured the paw print when they reached the crossing point. She took a soil sample from the game trail. She was going to build a dataset here that was going to take months to fully analyze, and she was only on day two.
Marco watched her work with the patient quality of someone who had been in the field long enough to understand what thorough looked like.
She said, while she was logging the paw print measurement: *has the facility always had this camera array? The equipment is newer than the station’s age.*
He said: *upgrades in phases. The first phase was about four years ago.* No thumbnail. *Director Silva sourced the equipment through a conservation technology grant.*
She noted: *camera upgrades four years ago. Conservation technology grant. Legitimate channel.*
She said: *how often does Director Silva do field surveys himself?*
Thumbnail.
He said: *he does regular rounds. He knows the territory as well as anyone.* And then added: *better.* As if correcting himself toward accuracy.
She noted: *regularly in the field. Knows the territory better than anyone. His phrasing: better.*
She stood up from the paw print. The female jaguar had gone into the understory to the north. She watched the direction it had gone and thought about the northern boundary that Dante Silva had described as a sector with access reviewed daily based on conditions.
She said: *the female that crossed — that’s approximately 53 kilos. That’s above the regional female average.*
Marco said: *the population here is generally healthy.* No thumbnail. Straightforward.
She said: *do the size distributions in the local dataset match what I’m seeing on the ground?*
He said: *I think so, but the Director would be the one to ask about the specifics.* No thumbnail. Genuinely redirecting, not containing.
She was building a picture of what Marco knew and what he was managing. What he knew: the operational details of the facility, the monitoring system, the ecological characteristics he’d been directly involved in documenting. What he was managing: anything that pointed toward the northern sector, anything that implied the territory’s anomalous characteristics had a cause he wasn’t describing.
The question was whether Marco knew what the cause was or whether he was managing information he’d been told to manage without understanding its source.
She was going to find out, but not by asking directly. Direct questions that Marco was managing produced careful narrow answers. Peripheral questions produced answers with thumbnails.
She needed to approach from the periphery.
At the end of the day’s survey she had: fourteen jaguar sightings (unprecedented for a day’s work in any other territory she’d studied), prey species distribution data that was going to require careful mapping, paw prints from five individual animals, and a growing conviction that the flood boundary was not geological.
She also had one more thumbnail moment. She’d asked Marco, while they were packing the field equipment at day’s end, what the species count had been in the most recent full survey of the southern sector. He’d said: *the surveys run seasonally, I’d have to pull the last report* and she’d seen it — the smallest version of the tell, the thumbnail barely pressing into the finger and releasing immediately.
Not containing something. Deciding whether to say something.
She said: *that’s fine. If there’s an overall species assessment I can review as part of the dataset access Director Silva mentioned, that would be useful.*
Marco said: *I’ll ask him.* Comfortable. He wanted her to have the data. The decision had just been whether to volunteer it or let her ask.
She noted: *Marco wants me to have the data. The containing is not instinctive — it’s trained. He defaults to transparent.*
She noted: *this is good to know.*
She wrote up the day’s survey in her quarters with the rain coming back on the tin roof and the river running high and brown below the veranda. Fourteen jaguar sightings. Five individuals measured or photographed in sufficient detail to begin a catalog. Prey species at carrying-capacity-plus levels that had no natural explanation. An ecosystem with characteristics that suggested careful, precise, sustained management.
She thought about Dante Silva, who had been personally involved in all territory surveys for thirty years, who had coordinated land management across multiple adjacent territories, who had offered her the local dataset without being pushed when she asked about the conflict data.
She thought: *he wants me to have some of the data.*
She thought: *he does not want me to have all of it.*
She thought: *the question is what lives in the gap.*
She put down her pen and looked at the door and thought about the man on the dock who had assessed her equipment cases with the quiet efficiency of someone who knew exactly what they were looking at.
She thought about the northern boundary.
She wrote: *Day 2. Southern sector. Healthy beyond regional standard — significantly. Marco’s tell identified. He’s managing information, not lying. Defaults to transparent when not containing. Fourteen sightings. The prey distribution is too even. The flood boundary is too straight. The territory has characteristics of sustained, precise management that a single research station cannot produce.*
She underlined the last line.
She wrote: *tomorrow: ask for the 2014 hydrological study. Ask about the species count. Ask about the upstream watershed.*
She thought: *approach from the periphery.*
She thought: *the northern boundary is where this gets real.*
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