arrangement for granted.[1269] The contention is often made that Livy must have given an account of the reform in his second decade (292-219) now lost; and there is a universal agreement that the reform was brought about not by statute, but by arbitrary censorial disposition.[1270] The censor commonly assumed to be the author of the change is either Fabius Buteo, 241, or Flaminius, 220.[1271] Against the latter may be urged the silence of Polybius[1272] and Livy,[1273] who in speaking at length of his opposition to the nobles makes no reference to this reform. In favor of Fabius it may be said that in 241 the full number of tribes was completed; and the name of the thirty-fifth, Quirina, corresponding to Romilia, the first rural tribe, suggests that the Romans intended to create no more. In naming the last tribe the censors seem to have had in mind the completion of the new system, to each component part of which they apparently guaranteed a definite share of political power, which would have been impaired by the further creation of tribes.[1274] A little reflection, however, will convince us of the impossibility of assigning the reform to any one censor or to a definite date. Livy could not have made much of it in the lost part of his history without leaving some trace in the epitome, which mentions far more trivial matters.[1275] The only explanation of the epitomator’s silence is that the reform was so gradual as to escape marked attention. This view is supported by a strict interpretation of Livy,[1276] who supposes the change to have come about naturally with the increase in the number of tribes, and of Dionysius,[1277] who ascribes the innovation, or a part of it, to no individual but to “certain powerful forces.” A conclusion as to the date of the reform, to be acceptable, must satisfy the conditions above mentioned. In earlier time, when there was a single classis, the centuries were made up within the tribes; but this simple system was rendered impossible by the increase in the number of classes.[1278] For convenience of administration the censors must soon after this enlargement have begun an effort to reduce the discord to harmony. One class may have been brought into agreement with the tribes more readily than another, and thus the readaptation may have extended through many lustra. The number of centuries probably did not long remain at one hundred and ninety-three. It may have received its first increase above that sum in 304, for instance, the date to which Niebuhr[1279] assigns the reform. The process may have been far advanced in 241, the date preferred by a majority of scholars, and completed by Flaminius in 220.[1280] The abolition of the equestrian prerogative may likewise have been gradual; it may have been retained in one class of comitial acts—elections or legislation, for instance—longer than in another. The conclusion that the changes were gradually introduced in the period from