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... Old Dalbeth ...
Maryann McElhinney - 1890
Mary McElhinney - 1878
James McElhinney - 1896
on the side of that stone -
John Kelly - 1864
Mary Kelly - 1877
John Kelly died 1864 and wife Mary Kelly died 1877. Daughter Mary (Kelly) McElhinney died 1890 and husband James McElhinney married 2nd Catherine Doherty.
Do you have them in census records? do you have their death certificates? At the very least this should give you an idea of when and where they were born.
For reference, James McElhinney & Mary Kelly married 20 Aug.1872.