Paul wrote
I can trace my ancestry to my ggg grandfather, b 1759, in Articlave, and there it ends. Ancestors were members of 1st Dunboe Presbyt, Ch. Most born in Ballywildrick Lower.
There are a few options still open to trace your ancestors in the mid-18th century. As you know the townland you could make a search of the Registry of Deeds, which has a surname and place-name index; you could undertake a search for the period 1730-1780 for example to see if any deed was registered. Also the McClelland estate was taken over by the Jackson family and a search for rentals/estate papers should be carried out. There may have been a family will so you could search PRONI will abstracts, as a 'long shot' (they have 13,000 will abstracts).
Gortinanima