The marriage record says that Florence's parents are Robert Reycroft and Jean Annie Miller.
Ontario Births has a Florence Loretta Raycroft, daughter of Robert Raycroft and Jane A. Miller, born in Lanark on 1 Jan 1906.
She is buried in the Auld Kird Cemetery, Block E. You can view her tombstone here. She died May 10, 1989. It doesn't appear that John is there. However, there is a Robert R. Boggis, who died in 1960 - and has a military tombstone. You can have a look at that too and see if he might fit somewhere.
http://www.rootschat.com/links/0fq3/RK