Who was Annie Barton?

Who was Annie Barton? All we know of her is that she was born in 1866 and died in 1958, presumably in Hamilton Ontario Canada.

Recently a local Hamilton woman was digging in her garden when she stumbled on a tombstone buried in the dirt.

The word "MOTHER" was carved in red, granite stone. A cross and leaf design fills out the marker's top left corner. The stone reads:

"In loving memory of
Annie Barton
1866-1958
 Till we meet again"

This story intrigued me. I began to wonder about Annie. Could I find out more about her? One thing that is mentioned in the original story is that Annie was originally buried in Woodland Cemetery. A search found this burial in that cemetery:

George Barton
1868-1949
His wife Annie Barton
1867-1950

Could this be Annie? Why are the dates of death different? Did the stone engraver goof and that meant a new stone had to be made?

According to a family tree online, George married Annie White and had 3 sons, and yes, they lived in Hamilton.

Read more at Is there a body in my backyard? Woman unearths 60-year-old gravestone while gardening