The more common report is that Remus contemptuously jumped over the newly raised walls and was forthwith killed by the enraged Romulus, who exclaimed, "So shall it be henceforth with every one who leaps over my walls."
Hor Book I Chapter 7: Death of Remus. The Legend of Hercules and Cacus.

As nothing could unite them into one political body but the observance of common laws and customs, he gave them a body of laws, which he thought would only be respected by a rude and uncivilised race of men if he inspired them with awe by assuming the outward symbols of power.
Hor Book I Chapter 8: The Political Constitution.

He called into his service twelve lictors. Some think that he fixed upon this number from the number of the birds who foretold his sovereignty; but I am inclined to agree with those who think that as this class of public officers was borrowed from the same people from whom the sella curulis and the toga praetexta were adopted -- their neighbours, the Etruscans -- so the number itself also was taken from them. Its use amongst the Etruscans is traced to the custom of the twelve sovereign cities of Etruria, when jointly electing a king furnishing him each with one lictor.
Hor Book I Chapter 8: The Political Constitution.

It had been the ancient policy of the founders of cities to get together a multitude of people of obscure and low origin and then to spread the fiction that they were the children of the soil.
Hor Book I Chapter 8: The Political Constitution.

"Go," said he, "tell the Romans that it is the will of heaven that my Rome should be the head of all the world. Let them henceforth cultivate the arts of war, and let them know assuredly, and hand down the knowledge to posterity, that no human might can withstand the arms of Rome."
Hor Book I Chapter 16: Disappearance of Romulus.

The son of Mars, Great Romulus.
Vrg Book VI Chapter 30: The future is described
By Anchises

Romulus was attending a sacrifice, being fond of sacred rites and divination,
Plt Romulus, chapter 7: The Foundation of Rome (cont.)