The Master Surname Database (not online) (mostly burials in Alberta cemeteries) of the Alberta Genealogical Society lists these names;
Luther BOOTH, 24 Feb 1871 - 15 Jul 1940
Brook BOOTH, 1873 - 1930
Henry BOOTH, Nov 1876 - 1959
Clara BOOTH, 1889 - 1960
all burials in the Streamstown cemetery.
So probably her husband Henry BOOTH died in 1959 and Naomi returned to England. In those days there were weekly papers that may have his death mentioned.
http://www.zipperpages.ca/find/libraries-public-in/Streamsto...http://abgensoc.ca/ Peter
The Edmonton Branch
http://www.agsedm.edmonton.ab.ca/