The collapse of silver mining after 1890 undermined the economy of Port Arthur .
Provoked by a prolonged tax dispute with Port Arthur and its seizure of a locomotive in 1889 , the CPR relocated all its employees and facilities to Fort William .
The collapse of silver mining after 1890 undermined the economy of Port Arthur   .
Provoked by a prolonged tax dispute with Port Arthur and its seizure of a locomotive in 1889 , the CPR relocated all its employees and facilities to Fort William .