2. The person who determined the Pomoe'rium yoked a bullock and heifer to a plough, having a copper-share, and drew a furrow to mark the course of the future wall; he guided the plough so that all the sods might fall inwards, and was followed by others, who took care that none should lie the other way. 3. When he came to the place where it was designed to erect a gate, the plough was taken up,[1] and carried to where the wall recommenced. The next ceremony was the consecration of the commit'ium, or place of public assembly. A vault was built under ground, and filled with the firstlings of all the natural productions that sustain human life, and with earth which each foreign settler had brought from his own home. This place was called _Mun'dus_, and was supposed to become the gate of the lower world; it was opened on three several days of the year, for the spirits of the dead. 4. The next addition made to the city was the Sabine town,[2] which occupied the Quirinal and part of the Capitoline hills. The name of this town most probably was Qui'rium, and from it the Roman people received the name Quirites. The two cities were united on terms of equality, and the double-faced Ja'nus stamped on the earliest Roman coins was probably a symbol of the double state. They were at first so disunited, that even the rights of intermarriage did not exist between them, and it was probably from Qui'rium that the Roman youths obtained the wives[3] by force, which were refused to their entreaties. 5. The next addition was the Coelian hill,[4] on which a Tuscan colony settled; from these three colonies the three tribes of Ram'nes, Ti'ties, and Lu'ceres were formed. 6. The Ram'nes, or Ram'nenses, derived their name from Rom'ulus; the Tities, or Titien'ses, from Titus Tatius, the king of the Sabines; and the Lu'ceres, from Lu'cumo, the Tuscan title of a general or leader.[5] From this it appears that the three tribes[6] were really three distinct nations, differing in their origin, and dwelling apart. 7. The city was enlarged by Tullus Hostilius,[7] after the destruction of Alba, and the Viminal hill included within the walls; Ancus Martius added mount Aventine, and the Esquiline and Capitoline[8] being enclosed in the next reign, completed the number of the seven hills on which the ancient city stood.