- THE YORK FACTORY EXPRESS: FORT VANCOUVER TO HUDSON BAY, 1826-1849 I found John O'Brien in the York Factory Express, and had no idea who he was. Later I found him on the Pacific Slopes, and after that, in an HBC post in the north. #YorkFactoryExpress #Journeys buff.ly/3dlLKHLJan 22, 2026 22:20