He was the first person elected to three terms as mayor of Charleston as a result of his win in June 1955.
[3] In his first term, Morrison originated the idea of closing the historic Charleston Orphan House and creating a new orphanage in the nearby suburbs around a series of cottages.
[4] During his final term in office, Morrison proposed changing the form of government to a manager system.
In October 1957, Morrison was diagnosed with throat cancer and underwent extensive radiation treatment which left him weakened.
He attended his final city council meeting in August 1959 before becoming too ill with kidney problems and side effects of his radiation treatment.