Very nice site - now I think I understand. I get confused by all the names. So based on that site, what do you think the odds are that Peter Heaney's birth would be included in the microfilm 926034 from familysearch. This is the description:
Parochial registers of Creggan Lower (Armagh), 1845-1881
The Catholic parish of Creggan Lower, also known as Cullyhanna, includes the civil parish of Newtownhamilton and part of the parish of Creggan.
It has Baptisms, 1854-1880; and marriages, 1845-1881.
All the siblings but one list Newtownhamilton on the LDS site.
Thanks!