[51] Geschichte der Malerei, Bd. I, p. 314.
[52] l. c. p. 417.
[53] A. Conti: Leonardo pittore, Conferenze Fiorentine, l. c. p. 93.
[54] l. c. p. 45.
[55] W. Pater: The Renaissance, p. 124, The Macmillan Co., 1910.
[56] M. Herzfeld: Leonardo da Vinci, p. 88.
[57] Scognamiglio, l. c. p. 32.
[58] L. Schorn, Bd. III, 1843, p. 6.
[59] The same is assumed by Merejkowski, who imagined a childhood for Leonardo which deviates in the essential points from ours, drawn from the results of the vulture phantasy. But if Leonardo himself had displayed this smile, tradition hardly would have failed to report to us this coincidence.
[60] l. c. p. 309.