The view given in the text follows Jones, H. S., _Companion to Roman
History_ (a brief synopsis); Grenier, A., _Bologne villanovienne et
étrusque_; Modestov, B., _Introduction à l’histoire romain_; and Peet, T.
E., _The Stone and Bronze Ages in Italy and Sicily_. For different
reconstructions, see De Sanctis, G., _Storia dei Romani_, i, chs. ii–iii;
Pais, E., _Storia Critica di Roma_, 2nd ed., i, ch. viii; Ridgeway, W.,
_Who were the Romans?_ _Proc. British Academy_, 1907.