Records prior to 1835 for ancestors living in Holycross/Ballycahill parish

My Ryan ancestores lived in the townland of Cormackstown in the Holycross/Ballycahill RC parish. However they were born and/or married prior to 1835.  Would their birth and marriage records likely to be found in an adjacent parish (i.e. Thurles); or were the Holycross records never kept prior to 1835? 

I'll certainly begin to search the Thurles records; however, these records are quite extensive, and there is little point in searching them if it is known that the RC parishes records of Holycross/Ballycahill were maintained prior to 1835 but later lost or discarded.  Any available information (or best guess) would be appreciated.

     Thanks:  IrishStew