Once, in Beijing, a young girl in a red gown huddled in a doorway. The doorway was not the kind of doorway best suited to huddling, and the gown appeared equally ill-designed for the purpose. Yet huddle she did. The rain dripped and sputtered from the sky, streaking her scarlet back as it fell.
After a time, she carefully unhuddled and picked up the bag that she had lain down beside her. She withdrew from it a small, glass orb, in which indistinct shapes and colours seemed to float. Lightning flashed briefly across the sky and as she held the...