Might this site help you? http://www.glasnevintrust.ie/genealogy/
It has a record of all graves from 1828 to the present day.
I typed in a random year and got this information:
Francis Quinn died: 1856, aged 10 - Others present in the grave.
I am not saying that is your Francis Quinn, just that is an example of what the free search yields. The pay rates seem reasonable for more detailed information.
Failing that, might it be possible to email them and attach your photograph? http://www.glasnevintrust.ie/customer_care/