in 1919 arza clair casselman moved to the town of prescott, ontario where he purchased a law practice from a local solicitor named john k. dowsley. dowsley was selling the practice as he had been recently appointed as a provincial court judge. it wasn't long after casselman moved to prescott and purchased his practice that he became heavily involved in municipal, provincial, and federal politics. in addition, casselman became involved with the prescott school board and the town's board of trade.