Sources which date Hall's death to 1919, such as Fred R. Shapiro's The Yale Book of Quotations, are in error. The confusion may have arisen because Hall published no further written work after 1919.
Kinne, Burdette (1943), "Voltaire Never Said it!", Modern Language Notes, 58 (7): 534–535, doi:10.2307/2911066, JSTOR2911066 – Article citing a letter dated 9 May 1939.
Kinne, Burdette (1943), "Voltaire Never Said it!", Modern Language Notes, 58 (7): 534–535, doi:10.2307/2911066, JSTOR2911066 – Article citing a letter dated 9 May 1939.