Dear Mellie
Welcome to Ireland Reaching Out!
As you can see from the link below, Seagoe is a Civil Parish in Co. Armagh:
http://www.irishtimes.com/ancestor/fuses/townlands/index.cfm?fuseaction=TownlandsInCivil&civilparishid=400&civilparish=Seagoe&citycounty=Armagh
Church of Ireland records for that parish begin in 1683 though there are some missing records in the series. Records for the corresponding Roman Catholic Parish of Derrymacash begin in 1836. If your ancestor, Adam, was Roman Catholic there will be no church record of his baptism or marriage as these events predate the records for that parish. If however he was Church of Ireland, you could try searching the sites below for a record of his baptism and marriage. Was he married in Ireland or the UK?
www.familysearch.org has a huge database of genealogical records including some church records for Ireland.
www.rootsireland.ie have a large collection of Irish Church records, however you have to pay to use this site.
http://www.ancestryireland.com/ website of the Ulster Historical Foundation
You can find out more about your ancestor's army career at the website of the National Army Museum:
http://www.nam.ac.uk/research/famous-units/89th-princess-victorias-regi…;
Other important sources include the Tithe Applotment Books and Griffith?s Valuation. Even though these sources only record the head of the household, the information is very important and can be valuable:
Tithe Applotment Books (1823-1837): http://titheapplotmentbooks.nationalarchives.ie/search/tab/index.jsp
Griffith?s Valuation (1847-1864): http://www.askaboutireland.ie/griffith-valuation/
The National Archives of Ireland: http://www.census.nationalarchives.ie/search/ you can search the 1901/1911 Census on the National Archives page too, for instances of the family name at that time
Remember to post any new information that you find here. The more information you post, the more likely it is that one of our volunteers will be able to advise or assist you. Also include information concerning which sources you may have already used so others may further your search.
Best of luck with your search
Clare Doyle
Genealogy Support