You had picked up the battered old volume because you thought it might be a quaint old story to leaf through on a rainy day - but now that you’ve opened it, you’re amazed: although most of the hundreds of pages are filled with dense scrawls you can’t understand, the very first page contains a Picture of a strange-looking island. Not only is the Picture displayed in vivid colour, not only is it exquisitely detailed, it’s animated – the view continually swirls, dives and swoops around the island.

Eventually it settles down to display a scene that looks like a wharf of some kind - but you can still see the clouds gently drifting past in the background. You feel an overwhelming urge to reach out and touch this incredible image...

Press your hand against the page.