Brendan,I suppose you got the Blennerhassett family tree from the Windmill visitor centre in Blennerville!It is fantastic to see the large pedigree chart near the main entrance.I am assuming that you are familiar with it,and if not it is well worth a visit.
Re my other reply,I am glad that I remembered seeing Morphy,that had changed to Murphy over time.The older cemetery in Ballyseedy was very rough the last time I was there,uneven ground.I think I also went to the cemetery in Ballymac,the road I took went over a railway track, but I think there was an easier way there,from the Castleisland side.(This was a couple of years ago)Angela.