I searched the Irish Family History online database at ROOTSIRELAND.IE. It has abt 20M B/M/D records for most Irish counties. Records before 1863 are increasingly sparse: almost non-existant before 1800.
For a J(ames) Devine and M(artha) Crumlish marriage at any date, anywhere in Ireland, I found 0 records.
The transcription of Irish records isn't complete. Several counties are missing. Also, occasionaly more records are added to counties otherwise complete. Suggest you visit the website, register (free), browse (free), and opt (free) to be notified when more records are transcribed.