The literature and online resources surrounding Abraham Lincoln, his assassination, and the social, political, and economic upheavals of the Civil War era are vast and I can’t cite everything that I read or dipped into online and off as I did research for this novel. But in addition to acknowledging digital and print records at the Baltimore & Ohio Railroad Museum, the Historical Society of Washington, D.C., the Library of Congress, the National Archives, and The New York Times, I’m particularly indebted to the following books: Mary Todd Lincoln by Jean H. Baker; Alley Life in Washington by James Borchert; The Age of Lincoln by Orville Vernon Burton; The Irish in America by Michael Coffey and Terry Golway; Lincoln by David Herbert Donald; The Lincolns by Daniel Mark Epstein; The Secret War for the Union by Edwin C. Fishel; Reconstruction by Eric Foner; Freedom Rising by Ernest B. Furgurson; Team of Rivals by Doris Kearns Goodwin; American Brutus by Michael W. Kauffman; Behind the Scenes by Elizabeth Keckley; The American Irish by Kevin Kenny; Throes of Democracy by Walter A. McDougall; A Nation of Counterfeiters by Stephen Mihm; Police in Urban America, 1860–1920 by Eric H. Monkkonen; Washington Through Two Centuries by Joseph R. Passonneau; Old Washington, D.C. by Robert Reed; The Grand Review by Georg R. Sheets; The Trial edited by Edward Steers, Jr.; Book of Poisons by Serita Stevens and Anne Bannon; Lincoln by Gore Vidal.
A special thanks to Lieutenant Nicholas Breul of the Metropolitan Police Department in Washington, D.C., who gave me a primer on the history of policing in Washington and also gave me a copy of an 1893 history of the department, DofC Police.