Glenys,
I had a good look around the graveyard of Christchurch Church of Ireland this afternoon but to no avail. In this area many of the older headstones were made of a type of sandstone which has not weathered well. Many were illegible. As the local parish is called Drumachose and as there is also a Drumachose Presbyterian Church, I also had a look around their older headstones, again to no avail.
Regards