In the royal buildings were accommodations, also, for a numerous body-guard[49] of the sovereign, made up of the chief nobility. It is not easy to determine with precision, in these barbarian governments, the limits of the several orders. It is certain there was a distinct class of nobles, with large landed possessions, who held the most important offices near the person of the prince, and engrossed the administration of the provinces and cities.[50] Many of these could trace their descent from the founders of the Aztec monarchy. According to some writers of authority, there were thirty great _caciques_, who had their residence, at least a part of the year, in the capital, and who could muster a hundred thousand vassals each on their estates.[51] Without relying on such wild statements, it is clear, from the testimony of the Conquerors, that the country was occupied by numerous powerful chieftains, who lived like independent princes on their domains. If it be true that the kings encouraged, or, indeed, exacted, the residence of these nobles in the capital, and required hostages in their absence, it is evident that their power must have been very formidable.[52] Their estates appear to have been held by various tenures, and to have been subject to different restrictions. Some of them, earned by their own good swords or received as the recompense of public services, were held without any limitation, except that the possessors could not dispose of them to a plebeian.[53] Others were entailed on the eldest male issue, and, in default of such, reverted to the crown. Most of them seem to have been burdened with the obligation of military service. The principal chiefs of Tezcuco, according to its chronicler, were expressly obliged to support their prince with their armed vassals, to attend his court, and aid him in the council. Some, instead of these services, were to provide for the repairs of his buildings, and to keep the royal demesnes in order, with an annual offering, by way of homage, of fruits and flowers. It was usual, if we are to believe historians, for a new king, on his accession, to confirm the investiture of estates derived from the crown.[54]