Welcome to Rootschat but one of the first places you should check is
www.familysearch.orgThe records are a mixture of extracted (from church records, vital records, etc.) and submitted (added by individuals and often full of errors, so should be viewed with extreme caution).
James Campbell and Margaret Parker/Parkes:
1. Mary born 15 June 1865 Dundalk, Co. Louth
2. Isabella born 23 Nov.1869 Dundalk, Co Louth
3. Teresa born 20 Oct.1871 Dundalk, Co. Louth.
???4. Margaret Elizabeth born 15 June 1867 Annacarriga, Co. Clare
(am suspicious about Margaret Elizabeth belonging to this family because of her birthplace)
Civil registration of births began in 1864 so you will not find Ann Jane's birth in 1861 (if that date is correct). Registration of marriages began in 1845 (Protestant) and 1864 (Catholic).
From the above details it looks as though you should concentrate on Dundalk area.