Cox, John (January 17, 2011). "Discovering 278: the home of Houdini". Wild About Harry. Retrieved January 22, 2017. ... I certainly knew the famous address -- "278" which is how Houdini always referred to his Harlem home.
Cox, John (June 25, 2017). "Inside Houdini's 278". wildabouthoudini.com. Retrieved January 8, 2018.