Joe, == Is that the same or different from the Discovery maps mentioned in this recent thread? == There are some major differences between the six-inch maps and the Discovery maps. For one, the scale is very different. The six-inch maps are, as implied in the name, drawn at a scale of six inches to the mile. This allows for much more detailed information, such as trees located close to buildings - which are, in turn, shown in more dimensional detail than on the Discovery maps. These maps also show individual fields, although they are not identified by name/number as they are, I understand, on the Griffith's Valuation maps. And the six-inch map shows the individual buildings as of the date of the maps, which can convey an idea of the disastrous change in population since 1838. I recall having driven along a small, barren road up near Lough Carra, and later seeing it on the 1838 map with about 20 houses on the road. But I think the most useful feature of the six-inch maps is the inclusion of actual townland boundaries. The Discovery maps do not show individual townland borders and, in a few cases, show only the apparent presence of a single-named townland when , in reality, there are two or three separate townlands present - separately identified by modifying names such as Beg, More, Upper, Middle, Lower, North, South, etc. The lack of townland borders and of some townland names is partially to avoid too much clutter. And there would be the difficulty of differentiating, say, a small stream from a townland boundary - when the stream coincides with that boundary as it does in many, many cases. The scale of the Discovery maps is about an inch and a quarter per mile. But the Disc. maps do show current roads and even "tracks", and individual buildings and driveways in non-built-up areas. And the Discovery maps are fully topographical, and show contours, etc. (I can't recall if the Mayo six-inch maps have this feature - I think some counties have used a mix of the first two series of six-inch maps, and these may have contour features or not....Dunno). But the Discovery maps are the ultimate "roadmaps" and, although I often do general planning for my Irish trips using the small scale Holiday maps (4 miles to the inch....not 4 inches to the mile [gr]), I take only the necessary Discovery maps with me to Ireland for my actual driving. Nine Discovery maps will cover nearly all of Co. Mayo (and a 10th one if you don't want to forget those people at the southern end of Shrule civil parish). If you wanted to see all of Mayo on the six-inch maps, you'd need 123 of them - and they are each also about 10 percent larger in size on the paper. And the cost of all of the Discovery maps for Mayo would be roughly 100 U.S. dollars......whereas just one of the 123 six-inch maps, on paper, from the Ordnance Survey in Phoenix Park, Dublin - would have cost about 70 dollars (the last time I checked, but now probably closer to 100. Ridiculous.) I guess that's enough rambling. There are many other differences, I'm sure. But the two map types actually serve different purposes - one for the history, and the other for just plain "getting around". Pete - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Pete Schermerhorn, in the glorious Berkshire hills of western Massachusetts

Before I forget again, thanks to all for enlightening me about the difference between the Discovery maps and Ordnance Survey maps! Joe -- Joseph W. Mann Jr. joe@mannfamily.cc The Origins Genealogy Project at www.mannfamily.cc/public/index.html Member, The Hudson County Genealogical Society at www.HudsonCountyNJGenealogy.org