Career
Manson came to Edmonton from Renfrew County, Ontario in 1891. He fast became one of the city"s leading contractors, and was responsible for the creation of buildings including the Alberta Hotel and the MacKay Avenue school. He was also a director of the Edmonton Brick Company and the Sand-lime Brick Company
He first sought political office during the 1905 municipal election, when he ran for and was elected alderman on Edmonton City Council, finishing second of eleven candidates.
Rather than seek a third term, he challenged incumbent mayor Robert Lee in the 1909 election and finished only forty-nine votes back.
After this defeat, he did not seek public office again. On May 10, 1932, Manson and two hired hands set out on a raft down the North Saskatchewan River in search of some missing cattle.
The wind blew the raft into a deep part of the river, where Manson, a non-swimmer, fell out and drowned. His body was recovered thirteen days later.