Served as town constable during which time he, along with his brother John were severely criticized for cruel treatment of Quakers. On order of Walderne he and his brother whipped Quaker women.
From "The Robertses of Northern New England", p. 27: "In 1683 a newly-appointed governor, backing various prior royal rulings in favor of the Mason heirs, began ordering new hampshire landholders to begin paying rent to Robert Mason. Thomas Roberts was one of three prominent residents and "large landowners" summoned to appear before the governor and ordered to arrive at some sort of settlement with Mason. The three engaged Mason in a rancorous session, refused to recognize his title or to pay rent, and demanded instead that the matter be brought directly before the King."
Though it took many years of litigation and appeals, the resident landholders ultimate prevailed and obtained clear title to the lands.