All the evidence suggests that Niall remained in Robert's warband for the years to come, fighting both the English-side generally and the MacDougalls in the west of Scotland. Niall even acted as a representative of Robert in negotiations with the English crown, on two occasions, in 1309 and 1314. As a reward for his loyal services to King Robert, Niall received his sister, Mary Bruce, in marriage.
King Robert
Niall