‘Ah, well, I won’t know that until I find it.’

She nods, deciding that she has done her bit by way of being civil and can now reasonably move on. But as she turns and starts off the diver swims alongside her. ‘You should try it,’ he says. ‘Diving. It’s quite something, beneath the water.’

‘I prefer dry land,’ she tells him, caught between staying and going.

‘You call that dry?’

The question makes her awkwardly conscious of how she must look, soaked to the skin, flushed from running, beanie plastered to her head.

As if sensing her discomfort, the young man says, ‘I could give you a lift, if you like.’ He gestures into the gloom and now she can make out a small boat bobbing a little ways behind him on the lake. It has an outboard motor and is evidently anchored so that he can return to it after his dive. She watches as he swims out to it, takes hold of the side and pulls himself aboard. The little boat rocks wildly but rights itself once he is in. He slips off his oxygen tanks and pulls down his rubber hood, revealing a mass of black curls. ‘Come on, I’ll take you across the lake,’ he tells her.

She shakes her head. ‘No. Thanks. I want to finish my run.’

‘I can bring the boat nearer the shore if you like. You won’t have to swim. Though, actually, I don’t think you could get any wetter.’

His teasing begins to rankle. She knows how bedraggled she looks, and now she is being made to feel more than a little silly. Soon he will detect her fear of the water, she is sure of it. And then Tilda has an idea. A startling, wild idea. An idea that makes her pulse quicken again, and fills her with a curious excitement.

Crazy, girl. Too much time on your own. It’d never work. You can’t do it. Can you?

She stills her thoughts. With no clear notion of what it is she is doing, only a clear picture in her mind of the end result she is aiming for, she focuses her attention on the boat. She forms no words in her head, utters no whisper beneath her breath. She is simply still, simply pulled into this one place, this one moment, this one visualized wish. And suddenly, as if a key has turned in a lock, or a switch has been thrown to connect a circuit, Tilda knows that it is done. Her amazement at the knowledge of this certain fact brings from her a short bark of laughter. The diver looks at her, puzzled. She waves good-bye and turns to go. He calls after her.

‘See you on the other side, then?’