The ultimate source of this description, as well as of the similar account given by Dionysius, is the censorial document already mentioned,[384] sometimes termed the “discriptio centuriarum,”[385] sometimes “Commentarii Servi Tullii”[386] on the supposition that Servius was the author. In reality it belonged to the Censoriae Tabulae[387] of the period immediately following 269.[388] The document gave a list of the classes, centuries, and ratings, and furnished directions for holding the centuriate assembly. As the military divisions and equipments mentioned by Livy in the passage above had been discarded long before this date,[389] they could not have been described in the document. The account of them found in our sources must, therefore, have been supplied by antiquarian study.[390] The annalist who first used these Tabulae in the censorial archives was Fabius Pictor.[391] Whether Livy and Dionysius derived their account directly from him or through a later annalist cannot be determined.[392] Though Cicero’s source may ultimately have been the same, he seems to have depended largely on his memory and is chronologically, though not in substance, less exact. In assigning seventy rather than eighty centuries to the first class he most probably has in mind a stage of transition from the earlier to the reformed organization.[393] A brief analysis of this description, as presented by Livy or Dionysius, will prove that it could not apply at the same time to an army and a political assembly: (1) The century of proletarians, which formed a part of the comitia, and which according to Dionysius was larger than all the rest together, was exempt from military service.[394] (2) The unarmed supernumeraries termed accensi velati must in their military function have lacked the centuriate organization, as will hereafter be made clear.[395] (3) The musicians and the skilled workmen who accompanied the army must also be eliminated from the centuriate organization of the army.[396] (4) The seniors, too, lacked the centuriate military organization.[397] (5) Thus the only pedites in the original centuriate system were the juniors. Even the military century of juniors was not in the beginning strictly identical with a voting century; and as time progressed, the one group diverged more and more widely from the other.[398]