I think you have it.
I did a search of Rectors of Rincurran and came up with a Rev John Bagwell Creagh, who would have been the incumbent at the time. Using a bit of imagination, the signature could be John B Creagh.
My ancestor was Robert Hughes b abt 1796 and was in the Wexford Militia and 12th Foot. I assume he must have been stationed at Cork.
His bride, Sarah Ware came from Titchfield in Hampshire but I have no idea what she was doing in Ireland. Robert left the army in 1838. The same year they had a son, Robert Hughes, b 1/7/1838 and moved to England in time to be in the 1841 census, living in Southampton.
Bob