I apparently took a rather long sabbatical from this family history and am ready to begin again.
I know that John Seager is buried in Pense, SK. He is described as "Uncle John Seager, died 17 Mar 1899, aged 70 years."He, James & Eliza Ann are the first persons buried in the Anglican churchyard (according to my mom at least). My mom's cousin Donald said Uncle John was a "cow punch" in the Old West.
Next time I drive past Pense, I'll stop to take a picture of the tombstone. Not sure when that will be, but now that Spring has arrived on the prairies, it should be easier.
I have had no luck in finding Frances Seager/Castle, but will continue to search. A trip to the LSD church may be in order.