House Books, in the Valuation Office in Dublin contain information similar to that found in Griffith's Valuation for a period of time preceding 1852. Probably about 1848. I have never seen them myself, but I have had information extracted from them that was useful The Valuation Office never allows any copying of the House Books. Many are just half A4 size (whatever that size is ?). There are several types of books associated with compiling for Griffiths Valuation and the House Books are just one type - but they don't exist for every part of Ireland. There are other books in the Valuation Office which are associated with the Rate Books which many people don't ask about. For example, one is the Perambulation Book (if you can believe such a name) and the other is the Field Book. I don't think they have a great deal of info. in them though. All are available for inspection, but not photocopying. Perhaps if someone on this list knows more they can explain further. Dave