I sat to one side of the dead woman, just outside the wide circle of spilled blood, and played a halting, broken-backed tune that was more like a question than a command. I was fishing: sending out feelers through the heights and depths of some vast volume that wasn’t air or water or even space, an infinity that fitted comfortably into this pokey little rented room.

Nothing. My hook was out there, but nothing bit.

It wasn’t that there was nothing there. Any building that’s more than a few years old develops a sort of emotional patina, a set of resonances that an exorcist will pick up at once if he opens himself to it. There were plenty of echoes in this room: the joys and sorrows and bumps and grinds of ordinary existence lingering in the air, in the brickwork, like the unstilled vibrations of a sound that had passed outside the range of human hearing.

But the ghost of Ginny Parris refused to come on down.

She was there. On some level, in some form, I was aware of a presence in the room. Diffuse and weak and scattered, it hung in the ether like Morse code, discontinuous but replete with meaning: a dot of misery here, a dash of fear and confusion there, and way over here an incongruous flash-silence-flash of hope. I went on playing, a little encouraged. Normally this stage of the game is kind of a cumulative thing. You start off slow, with only the barest sense of the ghost’s presence, but you zero in on it with your talent, with whatever interface you use to make your talent work for you. You describe and define and delimit it, bring it in closer, sharpen the signal. It can come fast or it can come slow, but sooner or later you reach a tipping point where it becomes inevitable. The pattern of the ghost is imprinted on your mind, and after that it can’t get away from you. You can make it come to you, bind it to your will. You can question it, and it has to answer you if it’s able. Or you can make it go away and never come back.

That wasn’t what was happening here, though; if anything, this was the exact opposite. The sense of Ginny’s presence got weaker rather than stronger: those vestigial traces effaced themselves more and more, faded away gradually and inexorably, until it seemed like it was only the music that was keeping them there at all.

I kept on playing. Typically, by this time, the random notes would have modulated into a recognisable tune. But they didn’t. They remained fragmented and formless, just as she was.