This adds another element. Where did you get the names of the parents of Maria Dolan from?
Is Thomas Ratchford the person she married?
Marriage and (death, birth/bap) records prior to 1900 were not kept by every state. You may have to search Church parish records, and this usually can't be done on the internet.
Finding the bap records for the eldest children of a couple can help localize where the marriage took place.
What does the 1880 census say about her parents' birth place, and hers?
If you attached something to your post, it didn't work.