The film numbers for the Tithe Applotments are arranged by civil parish. All of the civil parishes of Ireland are in alpha order. Northern Ireland's are in their own group, however. So if you know the civil parish, go to the LDS Family Library website (familysearch.org), click on the library catalog, and then on 'Place" and put the civil parish in the search box. When you get a list of topics, you will find the tithes under 'Land and Property'. -- Pat Connors, Sacramento CA http://www.connorsgenealogy.com