The references to Vasari, and Crowe and Cavalcaselle, are invariably to the latest editions, both in Italian: "Opere di Giorgio Vasari" (Firenze, G. C. Sansoni, 1879); "Cavalcaselle e Crowe" (Le Monnier, 1898).

The author desires to express her gratitude to Mr Bernhard Berensen, author of "Lorenzo Lotto," etc., for much help in her work.

Florence, October 1899.