It was accepted by Mommsen in his _Römische Tribus_ (1844) and in the first seven editions of his _History of Rome_; but in his _Römisches Staatsrecht_[1311] he has offered a radical modification: while holding to the 373 centuries, he maintains that they were so combined as to cast in all 193 votes. According to this theory the first class comprised 35 × 2 = 70 centuries, each with one vote, whereas the remaining classes together, made up of 4 × 35 × 2 = 280 centuries, cast but 100 votes. How the centuries were combined Mommsen does not presume to say. He considers it possible, however, that for instance sixty of the seventy centuries of the second class were grouped by threes and ten by twos, making twenty-five voting groups in all. Had he attempted to follow out in detail the practical working of the theory, he would hardly have offered it to the public. The votes could not have been determined by a majority of component centuries, for according to the theory some groups comprised but two. Or if the group voted by individuals without regard to the component centuries, the four lower classes were practically composed not of centuries but of larger, nameless voting divisions. His main support is the account of the centuriate organization given in Cicero’s _Republic_,[1312] which speaks of a hundred and ninety-three centuries, and which Mommsen[1313] believes to be a description of the reformed organization. Cicero’s[1314] assumption that the essential facts were known to the friends of the younger Scipio—the leader in the dialogue—and the discrepancy in the number of centuries of the first class between the Servian system as given by the annalists (Livy and Dionysius) and the organization which Cicero describes[1315] are the chief points in Mommsen’s favor. Against his interpretation it may be urged (1) that the passage is exceedingly uncertain;[1316] (2) that Cicero makes Servius Tullius the author of the organization which he describes; (3) that though the reform affected the details of the comitial organization, the principle—a distribution of the people according to ordines, census, aetates—remained the same from the time of Servius to the time of Cicero, so that he could assume that it was known to the hearers of Scipio; (4) that as to the discrepancy in the number of centuries in the first class, on the assumption that the text is correct, (_a_) Cicero, who was by no means infallible, may have made a mistake,[1317] being in this case especially liable to error because in the reformed organization the first class comprised seventy centuries, or (_b_) in case Cicero is right, either (_m_) the annalists may be in error in assigning eighty centuries to the first class, or (_n_) in an early stage of transition from the old to the new organization the number of centuries in the first class may have been cut down to seventy with a corresponding increase of ten in some other part of the system; (5)