From the recorded details of organization we learn that the governmental scheme introduced by the Incas was based on the assumption that the standard population of the empire should number 40,000 individuals under the civil rulership of 4 recorders, 40 first-grade officers, 400 second-grade officers, 4,000 third-grade officers—each of the last being responsible for nine individuals besides himself. It is noteworthy that the three grades of officers correspond to the threefold division of the entire produce of the land, between the Inca, the Huaca and the Ayllu, equivalent to the religious government, the civil government and the people—to the Above, Below and Middle. The minimal division of people into groups of ten of which one was the governmental representative corresponds, moreover, to the classification into the following ten categories, according to their ages: 1. Mosoc-aparic: baby, “newly begun,” “just born.” 2. Saya-huarma: child, “standing boy,” age 2-6. 3 Macta-puric: “child that can walk,” age 6-8. 4. Itanta-requisic: “bread-receiver,” boy about 8. 5. Pucllac-huarma: “playing boy,” age 8-16. 6. Cuca-pallac: “Coca pickers,” age 16-20. 7. Yma-huayna: “as a youth,” light service, age 20-25. 8. Puric: “able-bodied,” tribute and service, age 25-50. 9. Chaupi-rucca: elderly, light service, age 50-60. 10. Puñuc-rucca: dotage, no work, 60 upwards.(22) Although for statistical purposes, exact registers of each of these groups were annually made by the recorders, it is evident that the purics or “able-bodied” men constituted the most important portion of the population. They naturally fell into two groups consisting of the nobility and commoners, but scattered evidence amply provides that they were strictly classified according to the special service or tribute they rendered to the government. The best produce of each province was brought to Cuzco. The inhabitants of each region were specially trained to render certain services or to excel in particular industries—by this means each tribe gradually became identified with its special industry or aptitude. The necessity that the supply of their produce should be constant and regular, must have necessitated the permanent maintenance of a fixed number of workers at each branch of industry, a fact which would give rise to rigid laws controlling the liberty of the individual, forcing children to adopt their parents’ avocations and forbidding intermarriages between persons of different provinces. As scattered mention is made of the following general classification of the male population, I venture to note them as follows, provisionally: Nobility: Commoners. 1. lords: shepherds (of lamas), 2. priests: hunters, 3. warriors: farmers, 4. civil governors: artificers.