It is not possible to describe the invention that Leonardo showed in the garments of the soldiers, all varied by him in different ways, and likewise in the helmet-crests and other ornaments; not to mention the incredible mastery that he displayed in the forms and lineaments of the horses, which Leonardo, with their fiery spirit, muscles, and shapely beauty, drew better than any other master. It is said that, in order to draw that cartoon, he made a most ingenious stage, which was raised by contracting it and lowered by expanding. And conceiving the wish to colour on the wall in oils, he made a composition of so gross an admixture, to act as a binder on the wall, that, going on to paint in the said hall, it began to peel off in such a manner that in a short time he abandoned it, seeing it spoiling. [Illustration: LEONARDO DA VINCI: MONNA LISA (_Formerly Paris: The Louvre, 1601. Canvas on Panel_)] Leonardo had very great spirit, and in his every action was most generous. It is said that, going to the bank for the allowance that he used to draw every month from Piero Soderini, the cashier wanted to give him certain paper-packets of pence; but he would not take them, saying in answer, "I am no penny-painter." Having been blamed for cheating Piero Soderini, there began to be murmurings against him; wherefore Leonardo so wrought upon his friends, that he got the money together and took it to Piero to repay him; but he would not accept it. He went to Rome with Duke Giuliano de' Medici, at the election of Pope Leo, who spent much of his time on philosophical studies, and particularly on alchemy; where, forming a paste of a certain kind of wax, as he walked he shaped animals very thin and full of wind, and, by blowing into them, made them fly through the air, but when the wind ceased they fell to the ground. On the back of a most bizarre lizard, found by the vine-dresser of the Belvedere, he fixed, with a mixture of quicksilver, wings composed of scales stripped from other lizards, which, as it walked, quivered with the motion; and having given it eyes, horns, and beard, taming it, and keeping it in a box, he made all his friends, to whom he showed it, fly for fear. He used often to have the guts of a wether completely freed of their fat and cleaned, and thus made so fine that they could have been held in the palm of the hand; and having placed a pair of blacksmith's bellows in another room, he fixed to them one end of these, and, blowing into them, filled the room, which was very large, so that whoever was in it was obliged to retreat into a corner; showing how, transparent and full of wind, from taking up little space at the beginning they had come to occupy much, and likening them to virtue. He made an infinite number of such follies, and gave his attention to mirrors; and he tried the strangest methods in seeking out oils for painting, and varnish for preserving works when painted.