Are you sure you mean Llandillo in Breconshire?
EDIT: Aha! Maybe Llandilo Vane? AKA Llandilor-Fane.
This looks like her parent's marriage:
June qtr 1869
Merthyr Tydfil district vol 11a, page 609
Skerm, Mary Ann
+ and on the same page +
Jones, Thomas
Finally - a plea!

Please turn off Caps Lock! It's the internet equivalent of shouting!
