Many shops were well provided with drugs, roots, and different medicinal preparations; for Mexico abounded in medicinal plants, and the study of their uses was considered one of the most useful of the sciences, and in this respect the Mexicans were considerably in advance of the people of Europe. There were shops for the sale of blank books, or rolls, for the hieroglyphic picture writing. Under some of the porticoes were hides, raw and dressed; and various articles for domestic or personal use, made of leather. Animals, both wild and tame, were offered for sale; and near them Roger saw a gang of slaves, with collars round their necks, and these were also, Cuitcatl told him, for sale. The portion of the market devoted to the sale of provisions was a large one. Here were meats of all kinds, domestic poultry, game from the neighboring mountains, and fish from the streams; together with an immense variety of fruit, green vegetables, and maize. Here were ready-cooked foods for immediate use--sold hot to passers by, and eaten as they stood--with stalls of pastry of many kinds, bread, cakes, and confectionery; chocolate, flavored with vanilla and other spices, and pulque, prepared with many varying flavors, tempted the passers by. All these commodities, and every stall and portico, were set out and well-nigh covered with flowers. After leaving the market, Roger proceeded with his companion to the edge of the lake. It was dotted with countless canoes, traversing it in all directions, filled with people passing to and fro between the great capitals or neighboring cities, bent either upon pleasure or trade. After feasting his eyes for a considerable time upon the lovely and animated scene, Roger returned with his companion to the palace. In the afternoon there was a great gathering of nobles at the palace, to enable a far wider circle than those assembled the evening before to see and hear the king's white guest. One of the old counselors, who had been present at the previous meeting, acted as questioner, and this enabled Roger to escape certain queries to which he would have had difficulty in replying; and while the assembly heard much of the various wonders of the white people, they learned nothing of the manner in which the stranger had reached their shores, or the object of his coming; and at the end, the general impression that remained upon them was that he was a mysterious and supernatural being, who had come to teach the people new arts and inventions. When the meeting was over, Roger retired again to the private apartments, and entertained the ladies there with many details of European life and manners, and by sketching for them houses, and ships, and other objects they demanded. Two hours later, Cacama came in. He was evidently vexed and anxious.