The 1891 Canadian census page images with an index are now up at Library and Archives Canada's website (LAC) - 4,833,239 references apparently : http://www.collectionscanada.gc.ca/databases/census-1891/index-e.html
Census page images are available in .pdf or .jpeg
This presentation includes search helps and links to more information from LAC's Canadian Genealogy Centre. Search by surname, given names, keywords and locations. Let me know what keywords you find useful here, please! (Married? Widowed?)
These 1891 census images and the index are included in a collaboration between The Generations Network (TGN-Ancestry.ca) and Library & Archives Canada (LAC).
See this link for some information about this agreement and a timetable of other project releases: http://www.collectionscanada.gc.ca/about-us/012-215.01-e.html