Possibly the swiftest route to your roots.
Irish genealogy website directory.
www.irishchancery.net/
Description:
"The records of the Irish chancery were destroyed in an explosion in the Public Record Office of Ireland at the Four Courts, Dublin, in 1922. A Calendar of Irish Chancery Letters (CIRCLE) will provide a reconstruction of these important records. It will bring together all known letters enrolled on the Irish chancery rolls during the Middle Ages (1244–1509) using copies, transcripts and calendars ranging in date from the fourteenth to nineteenth centuries and located in various archival repositories in Ireland and the U.K. The final version of CIRCLE will be launched in June 2011."