Complex sentence: Gold Commissioner as the name of an important regional administrative post in the Colony of British Columbia which encompassed the duties of Goverment Agent, Indian Agent, magistrate, Mines Commissioner, surveyor, sheriff, coroner and other duties.
Split into simpler sentences: Gold Commissioner as the name of an important regional administrative post in the Colony of British Columbia. But a Gold Commissioner's powers and duties encompassed the duties of Goverment Agent, Indian Agent, magistrate, Mines Commissioner, surveyor, sheriff, coroner and other duties.