How confused the ideas of our historians, even the most prominent of them, are when it comes to a discussion of the Roman gens, is shown by the following example: In Mommsen's treatise on the Roman family names of the Republican and Augustinian era (Roemische Forschungen, Berlin, 1864, Vol. I.) he writes: "The gentile name was not only borne by all male gentiles including all adopted and wards, except, of course, the slaves, but also by the women.... The tribe (so Mommsen translates gens) is a common organization resulting from a common--actual, assumed or even invented--ancestor and united by common rites, burial grounds and customs of inheritance. All free individuals, hence women also, may and must claim membership in them. But the definition of the gentile name of the married women offers some difficulty. This is indeed obviated, as long as women were not permitted to marry any one but their gentiles. And we have proofs that for a long time the women found it much more difficult to marry outside than inside of the gens. This right of marrying outside, the gentis enuptio, was still bestowed as a personal privilege and reward during the sixth century.... But wherever such outside marriages occurred in primeval times, the woman must have been transferred to the tribe of her husband. Nothing is more certain than that by the old religious marriage woman was completely adopted into the legal and sacramental group of her husband and divorced from her own. Who does not know that the married woman releases her active and passive right of inheritance in favor of her gentiles, but enters the legal group of her husband, her children and his gentiles? And if her husband adopts her as his child into his family, how can she remain separated from his gens?" (Pages 9-11.) Here Mommsen asserts that the Roman women belonging to a certain gens were originally free to marry only within their gens; the Roman gens, according to him, was therefore endogamous, not exogamous. This opinion which contradicts the evidence of all other nations, is principally, if not exclusively, founded on a single much disputed passage of Livy (Book xxxix, c. 19). According to this passage, the senate decreed in the year 568 of the city, i. e., 186 B. C., (uti Feceniae Hispallae datio, deminutio, gentis enuptio, tutoris optio idem esset quasi ei vir testamento dedisset; utique ei ingenuo nubere liceret, neu quid ei qui eam duxisset, ob id fraudi ignominiaeve esset)--that Fecenia Hispalla shall have the right to dispose of her property, to diminish it, to marry outside of the gens, to choose a guardian, just as if her (late) husband had conferred this right on her by testament; that she shall be permitted to marry a freeman and that for the man who marries her this shall not constitute a misdemeanor or a shame.