Francis Hector Clergue (1856-1939)
A Maine born promoter, Clergue transformed Sault Ste. Marie into a major industrial centre. He purchased an unfinished hydroelectric station and canal at the Sault in 1894; then, lacking markets for his electric power, he created his own interdependent industries, which included Sault Ste. Marie Pulp and Paper (now St. Mary's Paper), Canadian Copper Company (now part if INCO), Algoma Steel and Algoma Central Railway. Clergue rebuilt the North West Company magazine as a blockhouse and used it as his residence and office during his early years in Sault Ste. Marie.
Plaque via Alan L. Brown's site Ontario Plaques. Full page here.