Ah, that must be it, Shaun. When I move on further with the transcript I shall expect to see Patricius Power return to home base ? Doesn't seem to explain the sudden drop-off in marriages ten years earlier ...
Just checked most of 1886/87 - Joannis Hickey seems to be in charge, but Frs Power and O'Donovan pop up from time to time. Presumably priests of neighbouring churches would 'play away' sometimes to cover, or maybe at the request of bride or groom.