identify three content of the letters Brutus receive?

Brutus' servant, brings him a letter (planted by Cassius) he has found in Brutus' private room. The first line of the letter reads, "Brutus, thou sleep'st. Awake, and see thyself" (2.1.46). Brutus interprets the letter as if it were a request from all of Rome to slay Caesar and restore the republic. The letter says Brutus should see his own noble nature within himself. The letter states that Brutus must act now before Rome falls into ruin.