Help me find the - Tribes to the east

Lady Catharine, the day has come now when I feel it my right to demand the cause of anything which troubles you. And that you are troubled is plain enough. Ever since this man Law-" "There," cried Lady Catharine, raising her hand. There must be a reason for this. Perhaps now I tribes to the east be of aid to you. Prove me, and at the last, ask who was indeed your friend. It is my fate.