Tilda levers off her trainers and heads upstairs to the tiny bathroom. The shower is old and temperamental and coughs unpromisingly when she turns it on. She leaves the water spluttering and pulls off her beanie and running clothes before deftly undoing the heavy plait that has restrained her hair. Steam begins to mist the mirror, so that her reflection is even more ghostly than usual. She wipes the glass and peers at the pale young woman who peers back at her. Swirls of vapor blur the image.

I could fade away entirely. It wouldn’t require effort. Just grow a little fainter every day.

She steps into the shower and lets the hot water cascade over her. Her white-blond hair becomes slick, darkening to pewter. Her skin flushes. Now she is the most colored, the most opaque she will ever be. She should have come with instructions: To render visible, add warm water. Her mother once told her that when she had first held her baby daughter in her arms she doubted anything so fragile, so thin skinned, so seemingly insubstantial, could survive. But Tilda had shown her. Had grown tall and strong. Had proved her wrong. As in so many things.

By the time she has dressed, dried her hair so that it hangs straight and loose, a crystal curtain down her back, the day is properly awake. She takes her mug of tea and steps out onto the small patio of mossy flagstones beyond the front door. As always, the view is like a deep breath of pure oxygen.

This is why we bought this place. This.

The flat piece of garden extends only a few paces to the low stone wall that separates it from the dizzying drop to the valley below. The landscape falls away abruptly, so that Tilda is gazing down upon a thick copse of trees—still more green than gold—and beyond to the sweep of small fields that lay around the lake. The water is glassy and still this morning, undisturbed by any breeze or activity, save for the movements of the families of waterfowl that have made the place their home. Beyond the lake, the Brecon Beacons rise up, an ancient shield of mountains against the wild weather and people of the west. When she and Mat had discovered the cottage, had stood on this very spot for the first time, he had taken her hand in his and they had ginned at each other in silence. They had both known, in that instant, that this was the place they would start their married life together, would live, would work.

Except that fate had other plans for them.