Answer:
Cassius wants to sway Brutus to help kill Caesar.
Step-by-step explanation:
In the excerpt from Shakespeare's "Julius Caesar," Cassius asks Cinna to put letters to Brutus where that he can find them. They intend to convince Brutus to join the conspiracy to kill Caesar. The reason is that they need Brutus to support them because he is considered a man of honor, so the death of Caesar would not be seen as a murder but as a necessary and creditable way of stopping his tyranny.