[12] David Budlong Tyler, Steam Conquers the Atlantic, New York and London, 1939.
[13] S. C. Gilfillan, Inventing the Ship, New York, 1935.
[14] Charles Frederich Partington, An Historical and Descriptive Account of the Steam Engine, London, 1822.
[15] J. Elfreth Watkins, "The Log of the Savannah," in Report of the U.S. National Museum for the Year Ending June 30, 1890, 1891, pp. 611–639.
[16] Previously, the author had assumed there was one boiler with two flues.
[17] Op. cit. ([footnote 4]).
[18] William Morgan and Augustin Creuze, eds., Papers on Naval Architecture, London, n. d., no. 12, p. 387.
[19] Letter from Carl C. Cutler to the author, November 24, 1958.
[20] Op. cit. ([footnote 5]).
[21] Withington, op. cit. ([footnote 7]), pl. 9, figs. 55, 56.