Career
He represented 2nd Prince in the Legislative Assembly of Prince Edward Island from 1970 to 1976 as a Liberal. He was born in Poplar Grove, Prince Edward Island, the son of George Percy MacArthur and Caroline Alice Adams. His victory was subsequently confirmed on a judicial recount.
MacArthur resigned due to poor health in 1976.
He died at the Stewart Memorial Health Centre in Tyne Valley at the age of 68.