The Orations of Marcus Tullius Cicero, Volume 4

When Julius, or, as he is usually called by Cicero Caius Caesar was slain on the 15th of March, A.U.C. 710, B.C. 44 Marcus Antonius was his colleague in the consulship, and he, being afraid that the conspirators might murder him too, (and it is said that they had debated among themselves whether they would or no) concealed himself on that day and fortified his house, till perceiving that nothing was intended against him, he ventured to appear in public the day following.

Lepidus was in the suburbs of Rome with a regular army, ready to depart for the government of Spain, which had been assigned to him with a part of Gaul. In the night, after Caesar's death he occupied the forum with his troops and thought of making himself master of the city, but Antonius dissuaded him from that idea and won him over to his views by giving his daughter in marriage to Lepidus's son, and by assisting him to seize on the office of Pontifex Maximus, which was vacant by Caesar's death.