^William Elliott Hazelgrove, Madam President: The Secret Presidency of Edith Wilson (Washington, D.C.: Regency Publishing, 2016); Brian Lamb, Who's Buried in Grant's Tomb?: A Tour of Presidential Gravesites (New York: Public Affairs, 2010), p. 119; Judith L. Weaver, "Edith Bolling, Wilson as First Lady: A Study in the Power of Personality, 1919–1920," Presidential Studies Quarterly 15, No. 1 (Winter, 1985), pp. 51–76; and Dwight Young and Margaret Johnson, Dear First Lady: Letters to the White House: From the Collections of the Library of Congress & National Archives (Washington, D.C.: National Geographic, 2008), p. 91.