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Old OS maps edit
Have a look at the mapviewer view of Illanmaster from the Ordnance Survey Ireland website. The Historic Layer 6" map from the mid-19th century is remarkably inaccurate. That gives some idea of the inaccessibility of the location; most of those surveys have stood the test of time very well. jnestorius(talk) 19:42, 22 September 2010 (UTC)