During the three winter months of December, January, and February, when the khan is living in his winter palace, all the nobles within a radius of sixty days' march are obliged to supply him with boars, stags, fallow-deer, roes, and bears. Besides, Kublai is a great huntsman himself, and his hunting-train is superbly mounted and kept up. He has leopards, lynxes and fine lions trained to hunt for wild animals, eagles strong enough to chase wolves, foxes, fallow and roe-deer, and, as Marco Polo says, "often to take them too," and his dogs may be counted by thousands. It is about March when the emperor begins his principal hunting in the direction of the sea, and he is accompanied by no less than 10,000 falconers, 500 gerfalcons, and many goshawks, peregrine, and sacred falcons. During the hunting excursion, a portable palace, covered outside with lions' skins and inside with cloth of gold, and carried on four elephants harnessed together, accompanies the emperor everywhere, who seems to enjoy all this oriental pomp and display. He goes as far as the camp of Chachiri-Mongou, which is situated on a stream, a tributary of the river Amoor, and the tent is set up, which is large enough to hold ten thousand nobles. This is his reception-saloon where he gives audiences; and when he wishes to sleep he goes into a tent which is hung all round with ermine and sable furs of almost priceless value. The emperor lives thus till about Easter, hunting cranes, swans, hares, stags, roebucks, &c., and then returns to his capital, Cambaluc. Marco Polo now completes his description of this fine city and enumerates the twelve quarters it contains, in many of which the rich merchants have their palatial houses, for commerce flourishes in this town, and more valuable merchandise is brought to it than to any other in the world. It is the depot and market for the richest productions of India, such as pearls and precious stones, and merchants come from long distances round to purchase them. The khan has established a mint here for the benefit of trade, and it is an inexhaustible source of revenue to him. The bank-notes, sealed with the emperor's seal, are made of a kind of card-board manufactured from the bark of the mulberry-tree. The card-board thus prepared is cut into various thicknesses according to the value of the money it is supposed to represent. The currency of this money is enforced, none daring to refuse it "on pain of death;" the emperor using it in all his payments, and enforcing its circulation throughout his dominions. Besides this, several times in the year the possessors of precious stones, pearls, gold, or silver, are obliged to bring their treasures to the mint and receive in exchange for them these pieces of card-board, so that, in fact, the emperor becomes the possessor of all the riches in his empire.