Plutarch, Caesar
Bernadotte Perrin, Ed.

67. Caesar thus done to death, the senators, although Brutus came forward as if to say something about what had been done, would not wait to hear him, but burst out of doors and fled, thus filling the people with confusion and helpless fear, so that some of them closed their houses, while others left their counters and places of business and ran, first to the place to see what had happened, then away from the place when they had seen. [2] Antony and Lepidus, the chief friends of Caesar, stole away and took refuge in the houses of others. But Brutus and his partisans, just as they were, still warm from the slaughter, displaying their daggers bare, went all in a body out of the senate-house and marched to the Capitol, not like fugitives, but with glad faces and full of confidence, summoning the multitude to freedom, and welcoming into their ranks the most distinguished of those who met them. [3] Some also joined their number and went up with them as though they had shared in the deed, and laid claim to the glory of it, of whom were Caius Octavius and Lentulus Spinther. These men, then, paid the penalty for their imposture later, when they were put to death by Antony and the young Caesar, without even enjoying the fame for the sake of which they died, owing to the disbelief of their fellow men. For even those who punished them did not exact a penalty for what they did, but for what they wished they had done.

[4] On the next day Brutus came down and held a discourse, and the people listened to what was said without either expressing resentment at what had been done or appearing to approve of it; they showed, however, by their deep silence, that while they pitied Caesar, they respected Brutus. The senate, too, trying to make a general amnesty and reconciliation, voted to give Caesar divine honours and not to disturb even the most insignificant measure which he had adopted when in power; while to Brutus and his partisans it distributed provinces and gave suitable honours, so that everybody thought that matters were decided and settled in the best possible manner.