As might be expected of this intimate friend of Wilibald Pirkheimer, he was a scholar as well as an artist, and we have from him three books, one on the proportions of the human figure, which shows how carefully he studied the essentials of his art; one on geometry and one on the art of fortification. Like Leonardo he felt his ability as an engineer, and like Raphael and Michelangelo was widely interested not only in every mode of art, but all the intellectual interests of his time. No more than the Italians he was not a narrow specialist in any sense of the word, and nothing shows so clearly as his career and achievements how much the spirit of genius was abroad at this time in Europe everywhere, lifting men up to heights of accomplishment that had scarcely been possible before. Besides Dürer, the great painters of South Germany were the Holbeins, father and son. Hans Holbein the elder first came into prominence at Augsburg as a partner to his brother Sigmund, a painter, none of whose works have come down to us. His early works are nearly all on the Passion and show the influence of his studies of the Passion Plays, so frequently given all over South Germany at this time. Early in the sixteenth century he came under Italian influence and painted some pictures that, while naive and primitive, exhibit evidence of high artistic ability. His fame was eclipsed entirely by his son, Hans Holbein, known as the younger, though there is no doubt at all of the influence exerted by Holbein the father on the art of his period, and his sketchbooks are precious material for the biography and customs of his contemporaries. His son left Augsburg about 1515 to become an illustrator of books at Basel. The first patron of the younger Holbein is said to have been Erasmus, for whom, shortly after his arrival, he illustrated an edition of the _"Encomium Moriae"_ by pen-and-ink sketches, which are now in the Museum at Basel. After some five years of work as an illustrator, Hans began to attract attention by his portrait drawings. Some of these, as J. A. Crowe in his article on Holbein in the ninth edition of {78} the "Encyclopaedia Britannica" says, are "finished with German delicacy and with a power and subtlety of hand seldom rivalled in any school." That he could paint with almost equal distinction his portrait of Boniface Amerbach, painted in 1519, furnishes ample evidence, for it is "acknowledged to be one of the most complete examples of smooth and transparent handling that Holbein ever executed" (Crowe).