I have found a marriage certificate for John and Margaret. 1st Presbyterian Church Letterkenny, Conwal Parish.3rd Oct.1878 - John McClintock, full age, Bachelor, Labourer of Cross, Taughboyne Parish, father-Alex McClintock, labourer. Eliza Latta , full age, spinster of Fassetmore, Leck Parish, father- Robert Latta - labourer.John Stevenson & Richard Devenny - witnesses.
cheers
Jack Gee