“Before the sparrow arrived, you had almost stopped thinking about flight. Then, last winter, it soared through the sky and landed in front of you, or more precisely on the windowsill of the covered balcony adjoining your bedroom. You knew the grimy window panes were caked with dead ants and dust, and smelt as sour as the curtains. But the sparrow wasn’t put off. It jumped inside the covered balcony and ruffled its feathers, releasing a sweet smell of tree bark into the air. Then it flew into your bedroom, landed on your chest and stayed there like a cold egg.”