“So that’s where you look for aliens. In the course of an eclipse totality track. When everybody else is looking awestruck at the sky, you need to be looking round for anybody who looks weird or overdressed, or who isn’t coming out of their RV or their moored yacht with the heavily smoked glass.

“If they’re anywhere, they’re there, and as distracted – and so as vulnerable – as anybody else staring up in wonder at this astonishing, breathtaking sight.

“The film I want to make is based on that idea. It’s thrilling, it’s funny, it’s sad and profound and finally it’s uplifting, it’s got a couple of great lead roles, one for a dad, one for a kid, a boy, and another exceptional supporting female role, plus opportunities for some strong character roles and lesser parts too.

“That’s the set-up. Now let me tell you the story.”

And, too, it begins somewhere else entirely…

“Between the plane trees and belvederes of Aspherje, on this clear midsummer early morning, the dawn-glittering Dome of the Mists rises splendidly over the University of Practical Talents like a vast gold thinking cap. Below, amongst the statues and the rills of the Philosophy Faculty rooftop park, walks the Lady Bisquitine, escorted.”

… like that, it begins like that, too.

And with a slight, stooped, unremarkable man walking into a small room in a big building. He is holding only a single sheet of paper and a small piece of fruit, but he is met with screams. He looks, unconcerned, at the only other man in the room, and closes the door behind him. The screams continue.

And it begins here, now, at this table outside this café on this street in the Marais, Paris, with a man dropping a tiny white pill into his espresso from a small but ornate sweetener box. He looks around, taking in the passing traffic and pedestrians – some hurrying, some flaneuring – and glances at the briskly handsome young Algerian waiter who is trying to flirt with a couple of warily smiling American girls, before his gaze settles briefly on an elegantly made-up and coiffured Parisienne of late middle age holding her tiny dog up to the table to let it lap some croissant flakes. Then he adds a gnarly lump of brown sugar from the bowl to his cup and stirs the coffee with a studied thoughtfulness as he slips the slim ormolu sweetener box back into a pocket inside his jacket.

He slides a five-euro note under the sugar bowl, replaces his wallet in his jacket, then drains the espresso cup in a couple of deep, appreciative sips. He settles back, one hand still holding the miniature handle of the cup, the other hanging by his side. He has now taken on the air of a man waiting for something.

It is an afternoon at the start of autumn in the year 2008 CE, the air is clear and warm beneath a milky, pastel sky, and everything is about to change.

I think I have been very clever in doing what I have done, in landing myself where I am. However, a lot of us are prone, as I am now, to think we’ve been quite clever, are we not? And too often in my past that feeling of having been quite clever has preceded the uncomfortable revelation that I have not been quite clever enough. This time, though…

My bed is comfortable, the medical and care staff treat me well enough, with a professional indifference which is, in my particular circumstances, more reassuring than excessive devotion would be. The food is acceptable.

I have a lot of time to think, lying here. Thinking is what I do best, perhaps. Thinking is what we do best, too. As a species, I mean. It is our forte, our speciality, our superpower; that which has raised us above the common herd. Well, we like to think so.

How relaxing to lie here and be looked after without having to do anything in return. How wonderful to have the luxury of undisturbed thought.

I am alone in a small square room with whitewashed walls, a high ceiling and tall windows. The bed is an old steel thing with a manually adjustable backrest and slatted sides that can be raised, clanging, to prevent the patient falling out of bed. The sheets are crisp and white, glowing with cleanliness, and the pillows, while a little lumpy, are plump. The linoleum floor gleams, pale green. A battered-looking wooden bedside table and a cheap chair of black-painted metal and faded red plastic comprise the room’s remaining furniture. There is a fanlight set into the wall above the single door to the corridor outside. Beyond the floor-to-ceiling windows is a small decorative balcony with iron railings.

Held behind these bars, the view is of a strip of grass and then a line of deciduous trees, with a shallow river behind them which sparkles in the sunlight when the angles are right. The trees are losing their leaves now and more of the river is becoming visible. On the far bank I can see more trees. My room is on the second, the top floor of the clinic. I saw a rowing boat glide down the river once with two or three people in it and sometimes I see birds. On one occasion, a high-flying aircraft left a long white cloud across the sky, like a ship’s wake. I watched it for some time as it spread slowly and kinked and turned red with the sunset.

I should be safe here. They will not think to look for me here. I think. Other places did occur to me: a yurt on some endless rolling steppe with only an extended family and the wind for company; some packed and noisome favela spattered across a steep hillside, the smell of shared sweat and the noise of bawling children, bellowing men and beaty music jangling; camping out in some lofty ruin of a monastery in the Cyclades, garnering a reputation as a hermit and an eccentric; underground with the other damaged tunnel dwellers, ragged beneath Manhattan.

In plain sight or secreted away, there are always many, many places to hide where they’ll never think to look, but then they know me and how I think, so perhaps they can guess where I’d head for even before I’d know myself. Then there is the problem of fitting in naturally or assuming a disguise, adopting a role: ethnicity, physiognomy, skin colour, language, skills – all must be taken into account.

We sort ourselves out, do we not? You lot there, this lot here; even in the great melting-pot cities we generally order ourselves into little enclaves and districts where we gain a comfort from a shared background or culture. Our nature, our sexuality, our genetic desire to wander and experiment, our lust for the exotic or the just different can lead to interesting pairings and mixed inheritances, but our need to group, grade and categorise continually pulls us back into set arrangements. This makes hiding difficult; I am – or at least I certainly look like – a pale Caucasian male, and the places I’m least likely to hide are such because I’d stand out there.

A trucker. That would be a good way to hide. A long-distance truck driver, beating across the US Midwest or the plains of Canada or Argentina or Brazil, or at the helm of a multi-trailer road train barrelling across the Australian desert. Hide through constant movement, seldom meeting people. Or a deckhand or cook on a ship; a container vessel plying the high seas with a tiny crew, turning around in twenty-four hours at vast, automated, nearly uninhabited container terminals far distant from the centres of the cities that they serve. Who would ever find me, living so distributed a life?

But, instead, I am here. I made my choice and I have no choice now; I must stick with it. I worked out my route, set up the means and the funding and the personnel with the required skills to aid me on my way into obscurity and unfindability, tested the ways those who might want to find me might set about doing so and worked out methods of frustrating their quest, then – with everything in place – went through with it.