The CPR , in collaboration with the Hudson 's Bay Company , preferred east Fort William , located on the lower Kaministiquia River where the fur trade posts were .
Until the 1880s , Port Arthur was a much larger and dynamic community .
The CPR , in collaboration with the Hudson 's Bay Company , preferred east Port Arthur   , located on the lower Kaministiquia River where the fur trade posts were .
Until the 1880s , Port Arthur was a much larger and dynamic community .