The Master Surname Database (not online) (mostly burials in Alberta cemeteries) of the Alberta Genealogical Society lists 7 DOWSETT names in cemeteries across Alberta, but none that fit your query.
For further research please contact the Research Committee of the Edmonton Branch.
http://abgensoc.ca/The Edmonton Branch
http://www.agsedm.edmonton.ab.ca/ And,
http://www.servicealberta.gov.ab.ca/1175.cfmPeter