Looking for any help on tracing the births and marriage of: Alexander DALE (Ballymulderg) and Sarah Anne CROSSETT (Killyfaddy) County Derry, Northern Ireland in 1850 - 1870. They later moved to Dumbarton, Scotland? Have tried civil records as both were Presbyterian (I think!)

Also same records of John BOYLE (Kilcoman, Asdee, Co Kerry, IRE) and Margaret Elizabeth CROMPTON, IRE both born mid 1830's? Finding RC parish records difficult to decipher.

Any suggestions will be appreciated.