Categories Image Rideau Street at Mosgrove (1977 and 1978) Post author By Chris Post date Sunday, November 25, 2018 Rideau and Mosgrove, 1978. Image: HBC Heritage.Rideau at Mosgrove, 1977. Image: HBC Heritage. Tags Ottawa ← Hudson’s Bay Wholesale Delivers (1970s) → Regional Council Meets for the First Time (1968)