For Pat(rick) Devlin M 1850 +/- 5 yrs, somewhere in Ireland, I found 39 rcds - too many to easily summarize here.
For Mary Higgins M ditto, I found 105 rcds - waaaay too many.
By carefully comparing the set of rcds for Patrick with those for Mary MOST of the many false positives can be eliminated. The resulting small set which match for yr and county can then be examined at the parish level of detail to see if there is a match there. If so, this/these stand a good chance of being for your ancestors. This assumes, of course, that the rcds survived. This will take several hours - more time than I wish to spend.