. Canaan, NH: Phoenix, 1983.

Devlin, Patrick. Too Proud to Fight: Woodrow Wilson’s Neutrality. New York: Oxford University Press, 1975.

Directory of Directors. City of Boston. Boston: Bankers’ Service Co., 1905.

Doerries, Reinhard R. Imperial Challenge: Ambassador Count Bernstorff and German-American Relations, 1908–1917. Translated by Christa D. Shannon. Chapel Hill: University of North Carolina Press, 1989.

Doyle, Arthur Conan. “Danger!” In Danger! and Other Stories. London: John Murray, 1918.

Egan, Timothy. Short Nights of the Shadow Catcher. Boston: Houghton Mifflin, 2013.

Figueiredo, Peter de. “Symbols of Empire: The Buildings of the Liverpool Waterfront.” Architectural History 46 (2003): 229–254.

Fontenoy, Paul. Submarines: An Illustrated History of Their Impact. Weapons and Warfare. Santa Barbara, CA: ABC–CLIO, 2007.

Forstner, Georg-Gunther Freiherr von. The Journal of Submarine Commander von Forstner. Translated by Mrs. Russell Codman. Boston: Houghton Mifflin, 1917.

Fox, Stephen. Transatlantic: Samuel Cunard, Isambard Brunel, and the Great Atlantic Steamships. New York: HarperCollins, 2003.

Frost, Wesley. German Submarine Warfare: A Study of Its Methods and Spirit. New York: D. Appleton, 1918.

Frothingham, Thomas G. The Naval History of the World War. Vol. 1. Cambridge, MA: Harvard University Press, 1925.

Gannon, Paul. Inside Room 40: The Codebreakers of World War I. Hersham, Surrey, UK: Ian Allan, 2010.

Garzke, William H., Jr., D. K. Brown, A. D. Sandiford, J. Woodward, and P. K. Hsu. “The Titanic and Lusitania: A Final Forensic Analysis.” Marine Technology 33, no. 4 (Oct. 1996): 241–289.

Gibson, R. H., and Maurice Prendergast. The German Submarine War 1914–1918. 1931. Reprint, Uckfield, East Sussex: Naval and Military Press, 2003.

Gilbert, Martin. The First World War. New York: Henry Holt, 1994.

Grant, Robert M. U-Boat Intelligence, 1914–1918. North Haven, CT: Archon Books, 1969.

Grayson, Cary T. Woodrow Wilson: An Intimate Memoir. 1960. Reprint, Washington, DC: Potomac Books, 1977.

Halpern, Paul G. A Naval History of World War I. Annapolis, MD: Naval Institute Press, 2012.

Hart, Peter. Gallipoli. New York: Oxford University Press, 2011.

Hazen, David W. Giants and Ghosts of Central Europe. Portland, OR: Metropolitan Press, 1933.

Hendrick, Burton J. The Life and Letters of Walter H. Page. Vols. 1–3. Garden City, NY: Doubleday, Page, 1922.

Hoehling, Adolf A., and Mary Hoehling. The Last Voyage of the Lusitania. London: Longmans, Green, 1957.

Holbourn, Ian B. Stoughton. The Isle of Foula. 1938. Reprint, Edinburgh: Birlinn, 2001.

Horgan, John J. Parnell to Pearse: Some Recollections and Reflections. 1949. Reprint, Dublin: University College Press, 2009.

Hough, Richard. Winston and Clementine. London: Transworld, 1990. Houston, David F. Eight Years with Wilson’s Cabinet, 1913 to 1920. New York: Doubleday, Page, 1926.

James, Adm. William. The Code Breakers of Room 40. New York: St. Martin’s Press, 1956.

James, William. “Address of the President Before the Society for Psychical Research.”