Possibly the swiftest route to your roots.
Irish genealogy website directory.
www.rootsweb.ancestry.com/~nirarm/landowners.html
Description:
The following individuals owned one acre or more of land in Co. Armagh, Ireland, the latter part of the 1870s. Of course, many more Irish owned less or none at all, and their names would not appear on this list. Some owned property in Co. Armagh but lived elsewhere.