6th Ed. Revised, Chapter 37, Practice and Review #6:
At nos, ispi multa mala passi, conati sumus eis iratis persuadere ut servos vinculis liberarent et ne cui nocerent.
But we, ourselves having suffered/endured many evil (things), have tried to persuade the angry (people) to free (the) slaves (from) chains and to whom not to do harm.
1. Shouldn't it be "ab vinculis" instead of just "vinculis"?
2. Why is it "cui" not ...