My great great grandparents were allegedly from Skerries. Nicholas and Catharine Galston(maiden name unknown) they ended up in wigan UK in the 1870s with several children.Nicholas I am told was a tailor and Catherine a seamstress.Looked for family history groups in Skerries,Dublin but nothing helpful. I need a marriage certificate for them or a birth registration for nicholas at least. A HUGE brick wall for me.