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30. Mabee, American Leonardo, 229.

31. Morse to Root, 10 February 1855.

32. John William Draper to the Committee of the Mechanics Club, 3 May 1858, John William Draper Family Papers, Manuscript Division, Library of Congress (hereafter cited as Draper Papers).

33. Taft, Photography, 27.

34. Draper to Committee, 3 May 1858.

35. "Dr. John Draper Dead," New York World, 5 January 1882, 4.

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