Hi Heywood,
When I first tried to obtain certificates for my Father and his siblings, the General Registry Office found all but 1 of the siblings. They were all born in Castletown, Registered in the Registrar's District of Castleconor, in the Superintendant's District of Dromore West, Co. Sligo.
There parents were married in Knockmore, Registrar's & Superintendant's District of Ballina, Co. Mayo
After a breakthrough on 'Genes-Reunited' I found the children of one on my Father's Brother. I made contact with them, and they could remember their Father mentioning the name of his Brother John Joseph (the one that I had not found).
I then wondered if he could have been born before they moved to Castletown, so looked for him on 'Familysearch' around Knockmore. I found a registration for a John Joseph, so applied to the General Registration Office for a photocopy of the Birth Entry - it had the same parents named and the person registering the birth was Bridget Brogan, Grandmother. These details are in a previous entry in the topic.
Listerdale