QUOTATIONS from contemporary sources come mostly from interviews or correspondence by the author with, among others, Peter Stangl, Richard Ravitch, Peter Kalikow, Joseph Lhota, Kent Barwick, Laurie Beckelman, John Belle, Ben Cheever, Nina Gershon, Judah Gribetz, Ashton Hawkins, Tony Hiss, Karl Katz, Harry Kelly, Caroline Kennedy, Maxinne Leighton, Fred Papert, Andrew Penson, Frank Prial Jr., James Sanders, John Zuccotti, and Metro-North officials and employees.
Other citations include contemporary news accounts, among them, articles by my Times colleagues; fiction and nonfiction books, magazines, screenplays, and other publications cited in the text, the bibliography, or both; primary sources, including letters and other documents from the New York Central Railroad and William J. Wilgus and others in the collections of the New York Public Library, the New-York Historical Society, the New York Railroad Enthusiasts and its Williamson Library, the New York Transit Museum, and the New York Central System Historical Society website, http://nycshs.org/; and documents from the New York City Landmarks Preservation Commission, the Metropolitan Transportation Authority, and other city, state, and federal agencies.