" But it wasn't just the bird, was it, Teddy thought as he lay in bed waiting for sleep to find him, the nightly oblivion kept at bay by meandering thought. It wasn't just the one lark that had been silenced by Izzie. (A mouthful.) It was the generations of birds that would have come after it and now would never be born. All those beautiful songs that would never be sung. Later in his life he learned the word "exponential," and later still the world "fractal," but for now it was a flock that grew larger and larger as it disappeared into a future that would never be. "

― Kate Atkinson