The royal revenues were derived from various sources. The crown lands,[73] which appear to have been extensive, made their returns in kind. The places in the neighborhood of the capital were bound to supply workmen and materials for building the king’s palaces and keeping them in repair. They were also to furnish fuel, provisions, and whatever was necessary for his ordinary domestic expenditure, which was certainly on no stinted scale.[74] The principal cities, which had numerous villages and a large territory dependent on them, were distributed into districts, with each a share of the lands allotted to it, for its support. The inhabitants paid a stipulated part of the produce to the crown. The vassals of the great chiefs, also, paid a portion of their earnings into the public treasury; an arrangement not at all in the spirit of the feudal institutions.[75] In addition to this tax on all the agricultural produce of the kingdom, there was another on its manufactures. The nature and the variety of the tributes will be best shown by an enumeration of some of the principal articles. These were cotton dresses, and mantles of feather-work exquisitely made; ornamented armor; vases and plates of gold; gold dust, bands and bracelets; crystal, gilt, and varnished jars and goblets; bells, arms, and utensils of copper; reams of paper; grain, fruits, copal, amber, cochineal, cacao, wild animals and birds, timber, lime, mats, etc.[76] In this curious medley of the most homely commodities and the elegant superfluities of luxury, it is singular that no mention should be made of silver, the great staple of the country in later times, and the use of which was certainly known to the Aztecs.[77] Garrisons were established in the larger cities,--probably those at a distance and recently conquered,--to keep down revolt, and to enforce the payment of the tribute.[78][79] Tax-gatherers were also distributed throughout the kingdom, who were recognized by their official badges, and dreaded from the merciless rigor of their exactions. By a stern law, every defaulter was liable to be taken and sold as a slave. In the capital were spacious granaries and warehouses for the reception of the tributes. A receiver-general was quartered in the palace, who rendered in an exact account of the various contributions, and watched over the conduct of the inferior agents, in whom the least malversation was summarily punished. This functionary was furnished with a map of the whole empire, with a minute specification of the imposts assessed on every part of it. These imposts, moderate under the reigns of the early princes, became so burdensome under those at the close of the dynasty, being rendered still more oppressive by the manner of collection, that they bred disaffection throughout the land, and prepared the way for its conquest by the Spaniards.[80]