XXIII. [1] Therefore Romulus and Remus worked together to found the city, in which they would reign equally, and Romulus designated a place which seemed suitable to him on the Palatine Mount, and wanted to call it Rome, while Remus did the same on the other hand on another hill five miles from the Palatine, and likewise called it Remuria from his own name. As the quarrel between them was incapable of solution, they referred it to arbitration by their ancestor Numitor. 

To satisfy the arbiter, they turned the dispute over to the immortal gods. Thus, whichever of them first met with favourable omens would found the city, would call it by his name, and reign with supreme power.

[2] And so they took omens, Romulus on the Palantine, Remus on the Aventine. Remus saw one first, six vultures flying together from his left, and then he sent to Romulus, announcing that he had be given an omen commanding him to found the city, and so he made haste to come.

[3] At that time he came up to Romulus and demanded, "What then of these omens?", and told him of them omen of the six vultures appearing together: "I, on the other hand," said Romulus, "will show you twelve!", and suddently twelve vultures appeared in the sky, followed by thunder and lightning.

[4] Then Romulus said: "What do you say, Remus, do you stand by your earlier sign, now you have seen this one?" Remus then realised that power had been stolen from him. ...

[5] But in truth, Licinius Macer's first book shows how the dangerous struggle ended in death. For at that very place Remus and Faustulus opposed (Romulus) and were killed.

[6] Against this, Egnatius in his first book says that Remus was not killed, but lived longer than Romulus.