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 drawn by the hand of Leonardo. Card. Silvio Valenti had a similar book, in which were caricature heads drawn with a pen, like that engraven by Count Caylus. Of these caricatures mention is made in the second volume of the Lettere Pittoriche, p. . The passage in the Lettere Pittoriche here referred to, is part of a letter without any name or date, addressed ''Al Sig. C. di C''.; but a note of the editor’s explains these initials, as meaning Sig. Conte di Caylus, and supposes the author to have been the younger Mariette. The letter mentions a collection of heads from Leonardo’s drawings, published by the Count; and the editor, in another note, tells us, that they are caricature heads drawn in pen and ink; that the originals were bought in Holland, from Sig. Cardin. Silvio Valenti, and that the prints of which the letter speaks, are in the famous collection of the Corsini library. The author of the Letter supposes these caricatures to have been drawn when Vinci retired to Melzi’s house, that he invented them as a new sort of recreation, and intended them as a subject for the academy which he had established at Milan.

In another part of the same Letter, p., , this collection of drawings of heads is again mentioned, and it is there said, that it might be that which belonged to the Earl of Arundel. This conjecture is founded on there being many such heads Rh