Hi,
Searching Family Search Org - online
finds 1916 Census - Harry Rowell LONGSTAFF and spouse
Constance Amelia LONGSTAFF - no children lised.
Shows that Harry Rowell LONGSTAFF arrived in Canada 1909.
1916 Census shows that Constance arrived in Canada 1913.
Registration of death for Harry Rowell LONGSTAFF shows spouse as Constance Amelia BLOTT
Death Regisration for Constance Amelia LONGSTAFF nee BLOTT
Parents Thomas BLOTT - Charlotte Amelia WATKIN.
Informant : son at Red Deer Alberta 1971
Search of Free BMD - online for Marriage of Constnce BLOTT in the time frame pre 1913 - 0 results.
SO - I assume that the marriage took place - in Canada - between 1913 and 1916.
Provincial Archive in Edmonton - may be able to assist with a search for marriage in that time frame.
Otherwise
Contact the Govt of Alberta Vital Statistics Registry offices - they may [hopefully] search for a date for little or no fee.
To Obtain a Regisration of Marriage/ Long Form Marriage Certificate - will cost $40 Cndn [aprox ]
From Alberta GenWeb Local History Book site - Online
LONGSTAFF, Harry R; Memories, Yours and Mine; Kneehill
LONGSTAFF, Harry; As the Years Go By; Kneehill
I cannot see a volunteer online
Search online Our Roots/ Nos Racines - the books may have been digitalized - to be read online.
Cheers & Good Luck, Stella