Leonardo said in his notes, "The painter who has obtained a perfect knowledge of the nature of the tendons and muscles, and of those parts which contain the most of them, will know to a certainty, in giving a particular motion to any part of the body, which and how many of the muscles give rise and contribute to it; which of them, by swelling, occasion their shortening, and which of the cartilages they surround. He will not imitate those who, in all the different attitudes they adopt or invent, make use of the same muscles in the arms, back, or chest, or any other parts.... It is necessary that a painter should be a good anatomist, that in his attitudes and gestures he may be able to design the naked parts of the human frame, according to the just rules of the anatomy of the nerves, bones, and muscles; and that, in his different positions, he may know what particular nerve or muscle is the cause of such a particular movement, in order that he may make that only marked and apparent, and not all the rest, as many artists are in the habit of doing; who, that they may appear great designers, make the naked limbs stiff and without grace, so that they have more the appearance of a bag of nuts than the human superficies, or, rather, more like a bundle of radishes than naked muscles." Leonardo irrigated the dry plains of Lombardy by utilizing the waters of the Ticino River, visiting many cities and towns throughout Lombardy for this purpose, and carefully studying the canals of Egypt under the Ptolemies. He studied ancient architecture also. In his epitaph, composed in his lifetime, he calls himself, "The admirer of the ancients, and their grateful disciple. One thing is lacking to me, their science of proportion. I have done what I could; may posterity pardon me." He designed a palace for Count Giovanni Melzi, at Vaprio, which became a favorite home for him, especially in the time of war--the residence of his beloved pupil, Francesco Melzi. In 1492, after Leonardo had been eleven years at the Court of Milan, Lodovico, unscrupulous and immoral, married the gentle and saintly Beatrice d'Este. Leonardo conducted the grand wedding festivities, and designed and decorated the bride's apartments in the Castello della Rocca, making a beautiful bath-room in the garden, adorned with colored marbles and a statue of Diana. While the regent in no wise discontinued his profligate habits, he yet desired to please his wife, by gratifying her taste for religious things. As she had shown an especial fondness for the Dominican church and convent of Santa Maria delle Grazie, Lodovico ordered them reconstructed and embellished for her. In the refectory, the artist painted kneeling portraits of Beatrice, her husband, and their two little children, Maximilian and Francesco; but they have long since faded.