Night is the permanent revolution, that of the globe. Every sundown the streets change, becoming sinister or libidinous, or, for that matter, longer or narrower or unexpectedly twisted. The familiar rebels against those who presume to know it. The map is altered and time is telescoped. Daylight restores things to their normal condition, or is that really their normal condition? The map of the city wrinkles and unfolds, wrinkles and unfolds.

The ghosts of Manhattan are not the spirits of the propertied classes; these are entombed in their names, their works, their constructions. New York's ghosts are the unresting souls of the poor, the marginal, the dispossessed, the depraved, the defective, the recalcitrant. They are the guardian spirits of the urban wilderness in which they lived and died. Unrecognized by the history that is common knowledge, they push invisibly behind it to erect their memorials in the collective unconscious.

We thought of [New York] as a free city, like one of those storied prewar tropical nests of intrigue and licentiousness where exiles and lamsters and refugees found shelter in a tangle of improbable juxtapositions.