How can I find info on my dad's mom?

[frogmarch]

All the information that my cousins (our dads were brothers) and I have on our paternal grandmother is her maiden name, her married name, and that she was born in 1894 in Missouri.

When I was a child, my birth mother's sister, who lived in England, told me that my dad had once asked her to place flowers on his mother's grave, which she told me she had gladly done. My aunt said that my dad's mom was buried in the cemetery that inspired Thomas Gray's famous poem, "Elegy Written in a Country Churchyard." The problem is that there are at least five different church cemeteries in England that claim to be the "Elegy" churchyard. Another problem is that my aunt is now 100 years old and unable to to remember much of anything.

When I told my cousins that our paternal grandmother was buried in England, they were surprised. They knew she'd died when our dads were young children, but none of my cousins knew she'd apparently died in England. Our dads were never forthcoming about their family history. All we really knew is that our paternal grandfather was a lawyer in St. Louis, and that after his wife, our grandmother, died, the children were lovingly cared for by a neighbor woman.

I have written to the parishes of all five "Elegy" churches, asking how I might try to find my grandmother's name in their burial records. Only one parish responded, saying they have no record of her, but added that their records are incomplete.

What can I do now? I don't have money to subscribe to a "find my ancestors" service.

Thanks for any advice.