Ellis, Frederick D., The Tragedy of the Lusitania (National Publishing Company, 1915), pp. 38–39; Preston, Diana, Lusitania, An Epic Tragedy (Walker & Company, 2002), p. 204; New York Tribune, "Frohman Calm; Not Concerned About Death, Welcomed It as Beautiful Adventure, He Told Friends at End", 11 May 1915, p. 3; Marcosson, Isaac Frederick, & Daniel Frohman, Charles Frohman: Manager and Man (John Lane, The Bodley Head, 1916), p. 387; Frohman, Charles, The Lusitania Resource
