The Master Surname Database (not online) (mostly burials in Alberta cemeteries) of the Alberta Genealogical Society lists these names;
Mary Hagen CONQUEST, 1873 - 23 Apr 1955 age 81
William CONQUEST, 1864 - 18 May 1942 (printer)
Charles Harold CONQUEST, 1925 - 25 Sep 1948
burial next to each other in the Athabasca cemetery.
Also mention of Her on page 55 of the Local History Book, "Pioneer Heritage Kirriemuir Altario District".
For further research please contact the Research Committee of the Edmonton Branch.
http://abgensoc.ca/Peter