Barrett moved to Wellington to open a hotel and in early 1840 was appointed Agent for the Natives by Wakefield, who said the role "will make him the medium between the settlers and their dark neighbours in all disputes and in the allotment of the native reserves in lieu of the land now occupied and cultivated by them". The position was rewarded with a £100 a year salary and Barrett received glowing praise from Wakefield for his loyalty and success as well as his interpreting skills.