The Irish Library Council recently announced that Griffith's Valuation is now available online at http://www.askaboutireland.ie. This is a tremendous help since in the past the indexes were available at http://www.failteromhat.com/ and other sites, but in order to view the details one had to pore through reels of microfilm. The results are available transcribed in web page (.html) format and images of the original document pages are also available. Maps of the area of interest are also available both current and historical. The current maps are from Google, however since there are many instances in Ireland where multiple locations having the same name exist not only in different counties but within the same county, it is necessary to carefully scrutinize the image Google presents to you. In my case I was looking for a townland called Cregg which is next to Oughterard. There are other Creggs in West Galway and Google chose to display one of those instead. I was not able to get the website to display the historical version of the same area. Happy hunting.