Crowe, J; Cavalcaselle, G (1885). Raphael: His Life and Works. John Murray. 2. London: [s.n.] pp. 108–109Much of this reference is involved in conjecture about the nature and movement of the painting. Anything later refuted has been ignored.
Grimm, H; Adams, S. The Life of Raphael. Alexander Gardner, Publisher to the Queen. London: [s.n.] pp. 170–171
Stowe, H (1896). Household Papers and Stories. 8. Boston and New York: Houghton Mifflan and Company. p. 67Stowe had written much about her appreciation of the great paintings of Europe, which used in the form of lithographs to decorate her home.