Vade Mecum at Rome, Vol. II
Binding: 8 1/8 x 5 1/2 in (206 x 140 mm)
Leaf: 7 3/4 x 5 1/4 in (197 x 133 mm)
Purchased by Pierpont Morgan in 1907
Half of the Ground Plan of the Grotto of the Casino Sacchetti (after Pietro da Cortona). Inscribed by the artist, repeatedly, in black chalk, siege and aqua.