Dear alison,Here are the Irish words and the English translation you're looking for:
Dia libh a bheirt iascairí bhreátha
Nach mbeidh ar ais ar barr na trá
Go raibh sibh sona sásta ar neamh
Tomás is Seán Ó Conghaile
God be with you two fine fishermen
Who will not be back at the top of the strand
May you have peace and happiness in Heaven
Tomás and Seán Conneely
-- Áine