St. Brendan lived on Croc Bresnainn and kept an order of Monks there
St. Finean built the first church in Castlersland at a place called Cahirinard. When people went to that church they had to cross a bridge called Oroiceab Naom Fionnan. One day as they were going to Mass they saw that the church was in halves and in two different parts of the river.
It was moved back again the next day. The ruins are still to be seen. IT