In Shakespeare's Julius Caesar, in Act Three, scene one, Caesar has been murdered by Brutus and his co-conspirators. Mark Antony has agreed to meet with Brutus and the others, asking them if they plan to kill him as well. Brutus only asks that Antony will listen to them before judging. Antony shakes hands with them, seeming to be of a like mind with these murderers, though he openly grieves for Caesar's death. Privately Antony promises that he will kill Caesar's assassins.
When the other men leave, Octavius' servant enters and Antony speaks with him. The servant informs Antony that his master received letters and is on his way to Rome. When Antony asks the servant if he is on his way, the servant reports that Octavius...
...lies tonight within seven leagues of Rome... (III.i.306)
which means that Octavius is about twenty-one miles outside of Rome. Antony expresses his concern that Rome may not be safe for Octavius.