Hello Tracy,
How exciting that you'll be travelling to the Emerald Isle in March next year to research your roots! I'd love to provide you with some suggestions on which archives and other interesting places to visit in
County Armagh.
Before 1864 records were kept in the form of church and parish records, and all of the remaining records have been sorted into county based genealogical centres. In this case I would recommend a visit to
Armagh Ancestry near the Navan Centre & Fort, as they will have access to all of the records and archives from this area and time period.
Forkhill falls under the
Archdiocese of Armagh, and you can reach out to them as well for parish records (marriage/baptism/death). There might also be some
information at the
National Library of Ireland, so if you're planning on visiting Dublin, I recommend a trip there too.
Are you still trying to find out more about the
Cassidy family before your trip? Please don't hesitate to reach out if you need any help!