Antonio.
66. A Woman in an antique dress, on panel. This may refer to Antonello di Messina. Not found.
67. Petrarch and Laura painted bookwise. This is doubtless a blundering description of the heads of Duke Federigo and Duchess Battista of Urbino, by Pietro della Francesca, placed like a diptych or book in the same frame. They have been engraved at [Volume I., p. 120], of this work, from the originals among the miscellaneous Italian pictures in the Uffizi.
68. A Franciscan Friar teaching mathematics to another person, on panel. This is ascribed to Ghirlandajo or Signorelli, but the subject makes it more probably a work of Pietro della Francesca, court painter to Duke Federigo. I have found no such picture.
Giorgione.
69. A Duke of Urbino, on canvas. Probably Guidobaldo I., but unfortunately lost.
Holbein.
70. Two Dukes of Saxony, bookwise, small. They are Frederick III. and John I.; now in the German room of the Uffizi, where they are ascribed to Lucas Cranach.