The public face of Washington-the gridiron of L'Enfant's avenues, the buttoned-down demeanor Sloan Wilson's archetypal "Man in the Grey Flannel Suit," the monumental buildings of the Triangle-rarely gives up the secrets of this city's rich life. But, beneath the surface there are countless stories to be told. From the early swamp days to the Civil War, the "gilded age" to the New Deal and McCarthy eras, as the center of world power to its underlying...