Salt and Skin

Chapter One: Three Waterproof Cases

The ferry to Laneira ran twice a week in spring, and the man who piloted it did not believe in handrails.

Senna Wilson braced her boot against the deck's raised lip and kept one hand flat on the topmost of her three waterproof cases, as though the equipment inside could feel her steadying it. Twelve thousand euros of spectrophotometer. Four thousand of temperature loggers. A dive computer she had owned for nine years and would not have replaced for money. The swell came in long slow shoulders out of the southwest, and each time the bow dropped, the cases shifted a centimeter against their straps and her stomach rose and fell with them.

"Primeira vez?" the pilot called from the wheelhouse. First time?

"No," she said. Then, because that was not exactly true, "Not on the island. On the boat."

He laughed as if she had made a joke, and maybe she had.

Laneira came up out of the haze like something surfacing. It was a volcanic outcrop eleven kilometers off the southern Portuguese coast, small enough that the whole of it fit inside her field of vision at once: black cliffs streaked with rust-red, a green shoulder of pine and eucalyptus, a scatter of whitewashed houses gathered around a stone harbor as if for warmth. Above the harbor, high on the eastern headland, a large house stood roofless in places, its scaffolding wrapped in blue plastic that snapped and flickered in the wind.

And below all of it, invisible from here but present in her chest like a held breath, the reef.

Her father had described this water to her when she was fourteen, sitting on the floor of their kitchen in Bristol with a chart spread across the linoleum and his thumb pressed to a spot of blue. He had said the words *natural laboratory* with the reverence other men saved for cathedrals. A warm eddy peeled off the current here and wrapped the island's southern flank, and inside that pocket of stolen heat grew a reef that had no business existing this far north — stony corals, cushion-shaped and stubborn, holding a whole small world together on the edge of what was possible.

He had gone out to it ten years ago on a February morning and had not come back.

The ferry's engine changed pitch. Senna took her hand off the case and put it in her jacket pocket, where it could not be seen to shake.

—

A man was waiting on the quay with a hand-lettered sign that read WILSON in cheerful, wobbling capitals, and beneath it, in smaller letters, *(the coral one)*.

"You're either Dr. Wilson or you've stolen someone's very heavy luggage," he said. He was somewhere around thirty, sun-bleached and broad-shouldered in a faded technician's fleece, with the kind of face that seemed to be halfway through a grin even at rest. "Callum Bright. Marine tech. Your hands and feet for the next two years, assuming you don't fire me in the first fortnight."

"Senna," she said, and shook his hand. "And I don't fire people. I just start doing their jobs myself until they notice."

"Terrifying." He hoisted the largest case before she could stop him and grunted. "Christ. What's in this, gold?"

"Optics."

"Same thing, on this island." He tipped his chin toward a dented white pickup. "Come on. I'll take you up to the cottage. Fair warning, the road is more of a suggestion."

The road was more of a suggestion. It climbed out of the village in switchbacks between dry-stone walls, past a chapel with a bell but no rope, past fig trees pruned into fists, past three goats that regarded the truck with open contempt. Callum talked the entire way, easily, requiring nothing, and Senna was grateful for it because it meant she did not have to explain why she kept turning her head to look at the sea.

"So the moorings are all in," he was saying. "I set the four sensor arrays in March like the pre-project brief said. Two on the outer ledge, two in the cove. Cove's the interesting one — it's called Cova do Sal, Salt Hollow, and the water in there runs a degree and a half warmer than everything outside it. Which by all rights should have cooked the coral dead years ago."

"And it hasn't."

"It bleaches," he said. "Every August, white as bone, you'd swear it was finished. And then by November it's got colour in it again. I've been photographing the same six colonies for two years for the pre-survey. Nobody's ever put proper instruments on it."

Senna felt something turn over in her, quiet and enormous. "That's what I'm here for."

"That," Callum agreed, "is what you're here for."

The cottage stood alone on the cliffside a kilometer east of the village: two rooms, thick walls, a blue-painted door, a stone bench outside worn into a shallow dip by generations of sitting. Someone had left a jug of wildflowers on the table and a note in Portuguese and English welcoming her and explaining that the hot water heater made a noise but was not dangerous.

From the doorway she could see the whole southern water, and the pale bloom under it where the reef lay, and — much closer, up the hill through a stand of umbrella pines — a high stone wall and the wrapped scaffolding of the roofless house.

"What is that?" she asked.

"The Saldana place." Callum set the last case down and straightened, wiping his hands on his thighs. "Famous, apparently. Álvaro Saldana designed it in the seventies — big deal architect, won prizes. Winter storm took the east roof off eighteen months back and it's been a building site ever since. His son's up there now, doing most of it himself, from what I hear."

"By himself?"

"There's a crew on and off. Mostly it's him." Callum's voice went carefully neutral in a way that made Senna look at him. "You'll probably hear the compressor. He starts early."

"I start earlier."

"Then you'll get on beautifully," he said, in a tone that meant the opposite, and grinned, and left.

—

She spent the afternoon doing the thing she was best at, which was making order.

The front room became a laboratory: the folding bench along the window for the spectrophotometer, the shelf above it for sample jars in ranks of twenty-four, a laminated calibration schedule taped to the wall at eye level. She set the field notebooks square to the edge of the table. She wrote the date at the top of a fresh page, and under it, in her small upright hand: *Day 1. Site inspection tomorrow, first light. Tide low at 06:12.*

The bedroom took nine minutes: bed, two shirts on hooks, a photograph propped against the lamp.

In it, Conor Wilson stood on the deck of the *Marianne* with a bucket in one hand and a rope in the other, squinting, laughing at whoever held the camera, which had been her. He had been a fisherman until he was thirty-one and an oceanographer after that, and he had never entirely stopped being the first thing. He named individual fish. He kept engine oil under his fingernails all through two degrees. He smelled of salt and diesel and the peppermints he sucked to stop smoking, and he had told her, more than once, that the sea did not hate anybody, which was not the same as saying it was safe.

The coastguard had found the *Marianne* eleven kilometers southeast of here, swamped, with her engine cover off and her nets stowed. They never found him.

Senna looked at the photograph for a while without touching it. Then she went out and sat on the stone bench with a mug of tea going cold in her hands and watched the light drain out of the water until the reef was just a rumor under black glass.

Somewhere up the hill, a hammer was still going. Steady, patient, unhurried, one strike every two seconds, long after there could have been any light to work by.

She listened to it until it stopped, which was after midnight, and she was surprised to find she had been waiting for it to.