"The Intellectual World of Benjamin Franklin: An American Encyclopedist at the University of Pennsylvania," 1990
"Benjamin Franklin: In Search of a Better World," Benjamin Franklin Tercentenary traveling exhibition, 2005-2008
Grimwade, Arthur G, London Goldsmiths, 1697-1837, Their Marks and Lives (London: Faber and Faber, 1976)
Henkels, Stan V. & Son, Relics of Benjamin Franklin and Family Papers, Estate of Ellen Duane Davis, Deceased... To Be Sold... June 16th, 1924...."
Talbott, Page, ed., Benjamin Franklin: In Search of a Better World (New Haven and London: Yale University, 2005) (companion book to exhibition of same title)
Winegrad, Dilys Pegler, ed., The Intellectual World of Benjamin Franklin: An American Encyclopaedist, at the University of Pennsylvania, an exhibition catalogue (Philadelphia: Smith-Edwards-Dunlap, 1990).
The spoon was purchased from the estate of his descendant Ellen Duane in 1924. A letter from Stan. V. Henkels, auctioneer, states: "This is to certify that the Silver Porridge Spoon sold by Stan. V. Henkels & Son, June 16th, 1924, as lot No. 6 in their catalogue, belonged to Benjamin Franklin, and was inherited in direct descent from his Estate by the Late Ellen Duane Davis." University of Pennsylvania, Rare Book & Manuscript Library, Gift of the Class of 1904.