Irish Valuation Revision Books at PRONI (Public Records Office of Northern Ireland) covering counties Antrim, Armagh, Down, Fermanagh, Londonderry and Tyrone between the years 1864 to 1933.
In total, c.3,900 volumes were digitally
captured, with over 440,000 images now available to view online.
As of this blog post, the books are only searchable by placename, and there are still 41 volumes to be scanned.
Genealogists with Northern Ireland ancestors will want to take a look at these Valuation Revision Books.