Fig. 56.—St. Christopher. From a Venetian print

North. The designs in Italian books up to the year 1530, when cross-hatching was introduced, do not differ essentially in character from those of which examples have already been given. The names of the artists who produced them are either obscure or unknown, excepting Leonardo da Vinci, to whom are ascribed the cuts in Luca Pacioli’s volume, De Proportione Divina, published in 1509, and Marc Antonio Raimondi (1478–1534), to whom are ascribed the