The cave did not frighten Isobel.
The possibility of miscalculation did.
She crouched once beside the scattered scraps, not touching them. Her gaze tracked outward instead of inward — mapping radius, not mess.
"Don't move," she said quietly.
It wasn't fear.
It was geometry.
Roald froze mid-breath.
Sir. Wilkinson did not argue.
Isobel stepped backward from the cave mouth and pivoted toward the treeline. Her eyes lifted, scanning trunk height, branch spread, wind direction. She chose quickly — not the tallest tree, but the tallest with clean upper access and cross-branching support.
Efficiency.
She ran.
Not recklessly — but with purpose sharpened thin as wire.
Two strides. A rock. A low branch.
Her foot hit bark, pushed, and she was airborne just long enough to catch the first limb. Fingers hooked. Weight shifted. No wasted motion.
Up.
Boot to trunk. Palm to bark. Knee to split branch.
She did not look down.
Within seconds she was beyond eye-level.
Within ten, she was part of the canopy.
From below, Roald blinked.
"She does that too easily."
Sir. Wilkinson's gaze never left the upper branches.
"She was raised by terrain," he said evenly.
Above them, Isobel moved differently.
On the ground she walked.
In the trees she vanished.
Her breathing flattened. Her shoulders lowered. She adjusted to the rhythm of sway and leaf.
The forest spoke in small languages:
Insect drift. Bird repositioning. Squirrel scatter. Wind break.
She listened.
Not with ears alone.
Her eyes narrowed toward the western line — the direction they had approached from. Nothing displaced. No secondary prints on moss near the river bend.
North.
A crow lifted abruptly from lower canopy.
She stilled.
The lift was wrong.
Not predator panic.
Startle.
Her gaze traced downward through layers of green.
There.
Half-concealed between two trunks where underbrush thickened unnaturally.
Something metallic caught light for less than a second.
Not polished.
Not abandoned.
Placed.
Isobel did not react outwardly.
Her fingers tightened once against the bark.
It was not from her stores.
It was not from the cave.
It was deliberate.
She shifted her weight and changed vantage slightly — enough to confirm angle without betraying awareness.
The object was small.
Compact.
Mechanical.
And positioned at a height that suggested someone of deliberate thought had placed it — not dropped it.
Below, Roald shifted impatiently.
"Anything?" he called softly.
No answer.
Sir. Wilkinson did not look at Roald.
"She does not answer while calculating."
Above, Isobel tracked outward from the object.
Footprints would not survive this ground long.
But disturbance did.
And there — faint, nearly respectful — bark scored by boot edge at a climbing angle.
Not hers.
Not recent wind damage.
Someone else had used elevation.
Not as fluidly.
But effectively.
Isobel's jaw set.
This was not wandering wildlife.
This was reconnaissance.
She lowered herself two branches — silent as leaf-fall — and changed direction across the canopy, widening her scan radius.
If one device was placed, there might be more.
Her mind ran probabilities:
— Surveillance.
— Trap trigger.
— Signal relay.
— Test.
And then she felt it.
Not saw.
Felt.
The forest had adjusted to her presence.
But something else had adjusted too.
A pause in bird chatter further west.
Subtle.
Measured.
Watching.
Isobel stopped fully.
She did not search wildly.
She waited.
Thirty seconds.
A minute.
The silence held.
Below, Roald's fingers twitched at his sides.
Sir. Wilkinson's posture had shifted — not toward panic, but readiness.
Then—
A soft mechanical click.
Not from the cave.
From the direction of the metal glint.
Isobel's eyes flicked back.
The object had not moved.
But something near it had.
A thin line — nearly invisible — now taut between two trunks.
Wire.
She had not seen it before.
Which meant it had been slack.
Which meant—
It had just been activated.
Her voice came down calm and sharp:
"Step away from the cave."
Roald did not hesitate.
Sir. Wilkinson moved with him.
Above them, the forest held its breath.
And somewhere beyond visible range—
Something listened.