Saying good-bye to a city is harder than breaking up with a lover. The grief and regret are more piercing because they are more complex and unmixed, changing from corner to corner, with each passing vista, each shift of the light. Breaking up with a city is unclouded by the suspicion that after the affair ends, you'll learn something about the beloved you wished you never knew. The city is as it will remain: gorgeous, unattainable, going on without you as if you'd never existed. What pain and longing the lover feels as he bids farewell to a tendril of ivy, a flower stall, the local butcher. The charming café where he meant to have coffee but never did.