Hey Ibbotson,
Just so you know Wilkie is a small town of about 1301...I just so happen to have a Wilkie town history book on my bookshelf (my grandparent's lived there just for a few years). It does mention a John and Annabelle McCorquodale he died in 1932, born March 22, 1859 from Guelph, ON. He moved from Killaryney, MB to Coldspring district via North Battleford in 1906. She died in 1954 which matches the headstone Sandra found.
Hopefully this helps,
Jeff