The history of Michelangelo's Leda, which now survives only in doubtful reproductions, may be introduced by a passage from Condivi's account of his master's visit to Ferrara in 1529. "The Duke received him with great demonstrations of joy, no less by reason of his eminent fame than because Don Ercole, his son, was Captain of the Signory of Florence. Riding forth with him in person, there was nothing appertaining to the business of his mission which the Duke did not bring beneath his notice, whether fortifications or artillery. Beside this, he opened his own private treasure-room, displaying all its contents, and particularly some pictures and portraits of his ancestors, executed by masters in their time excellent. When the hour approached for Michelangelo's departure, the Duke jestingly said to him: 'You are my prisoner now. If you want me to let you go free, I require that you shall promise to make me something with your own hand, according to your will and fancy, be it sculpture or painting.' Michelangelo agreed; and when he arrived at Florence, albeit he was overwhelmed with work for the defences, he began a large piece for a saloon, representing the congress of the swan with Leda. The breaking of the egg was also introduced, from which sprang Castor and Pollux, according to the ancient fable. The Duke heard of this; and on the return of the Medici, he feared that he might lose so great a treasure in the popular disturbance which ensued. Accordingly he despatched one of his gentlemen, who found Michelangelo at home, and viewed the picture. After inspecting it, the man exclaimed: 'Oh! this is a mere trifle.' Michelangelo inquired what his own art was, being aware that men can only form a proper judgment in the arts they exercise. The other sneered and answered: 'I am a merchant.' Perhaps he felt affronted at the question, and at not being recognised in his quality of nobleman; he may also have meant to depreciate the industry of the Florentines, who for the most part are occupied with trade, as though to say: 'You ask me what my art is? Is it possible you think a man like me could be a trader?' Michelangelo, perceiving his drift, growled out: 'You are doing bad business for your lord! Take yourself away!' Having thus dismissed the ducal messenger, he made a present of the picture, after a short while, to one of his serving-men, who, having two sisters to marry, begged for assistance. It was sent to France, and there bought by King Francis, where it still exists."