Hard, sometimes, to untangle experience from memory. She raised the phone, tapping the screen to bring the unruly focus under control. The screen presented a world much smaller than her sightline, a compacted miniature of reality in a vivid block of light. Colours burst from every passing pedestrian; yellows and reds the summer side of a bloom of flowers, deep rich purples, slow baby blues the colour of a thought as it escaped knowledge.

There. Good. She tapped again and the image froze, briefly, shearing the moment off from the onward march of reality and into a pocket world of memory – the phone’s memory, the memory of the cloud, incorporeal and endless. Her own memory, whenever she needed it.

This fragment was hers, an image of a crowd breaking around her like the sea. No matter how far she came from this world of damp heat and the close tumult of human contact, she could pick this photograph from a digital file and see. How it was. Who she was when she was here, that was contained behind the image but memory is a two-way process. The memory remembers you also.

She lowered the phone, slipped it like a sea-smoothed pebble into her pocket, moved as if she had never been still into the crowd. Off, now, to places of silence.