The Romans believed that the three tribes which composed the primitive populus were created by one act in close relation with the founding of the city.[9] For some unknown reason they were led to connect the myth of Titus Tatius, the eponymous hero of the Tities,[10] with the Quirinal,[11] and with the Sabines,[12] who were generally supposed to have occupied that hill.[13] Consequently some of their historians felt compelled to defer their account of the institution of the tribes till they had told of the union of the Sabines with the Romans, which at the same time gave them an opportunity to derive the names of the curiae from those of the Sabine women. Varro,[14] however, who protests against this derivation, refers the organization of the people in the three tribes to an earlier date, connecting it immediately with the founding of Rome. Though he affirmed that one tribe was named after Romulus, another after Titus Tatius, and the third, less positively, after an Etruscan Lucumo, Caeles Vibenna, who came to the aid of Romulus against Titus Tatius,[15] neither he nor any other ancient writer identified the Tities with the Sabines, whose quarter in the city was really unknown,[16] or the Luceres with an Etruscan settlement under Caeles whether in the Vicus Tuscus[17] or on the Caelian hill.[18] Since the Romans knew the tribe in no other relation than as a part of the state, they could not have thought of their city as consisting originally of a single tribe, to which a second and afterward a third were added, or that any one of these three tribes had ever been an independent community. These views are modern;[19] there is no trace of them in the ancient writers.[20] Even if it could be proved that they took this point of view, the question at issue would not thereby be settled; for no genuine tradition regarding the origin of the primitive tribes came down to the earliest annalists; the only possible knowledge they possessed on this point was deduced from the names of the tribes and from surviving institutions presumably connected with them in the period of their existence.[21] Under these circumstances modern speculations as to their independent character and diverse nationality seem absurd. The proper method of solving the problem is to test and to supplement the scant sources by a comparative study of the institution.