Ab urbe condita

The knights were first summoned to record their vote, then the eighty centuries of the infantry of the First Class; if their votes were divided, which seldom happened, it was arranged for the Second Class to be summoned; very seldom did the voting extend to the lowest Class.

Nor need it occasion any surprise, that the arrangement which now exists since the completion of the thirty-five tribes, their number being doubled by the centuries of juniors and seniors, does not agree with the total as instituted by Servius Tullius.

For, after dividing the City with its districts and the hills which were inhabited into four parts, he called these divisions “tribes,” I think from the tribute they paid, for he also introduced the practice of collecting it at an equal rate according to the assessment. These tribes had nothing to do with the distribution and number of the centuries.