Listoghil is tomb 51. It is the only tomb here to have a cairn covering it. Its excavation has thrown up some serious questions which are very interesting.
The carin has a kerb made up of 107 stones and is around 32m in diameter. This kerb could be earlier than the burial chamber. The chamber was erected on the highest and most central spot on the plateau. Most of the other tombs seem to point towards this spot, giving the location a massive significance. This does not mean that the tomb was the focus though, as this is much newer than the original activity on this spot.
Beneath the tomb is a bed of clay/morraine that was set into a large, round pit purposely dug to hold the substance. This seems to have been used as a funeral pyre location on many occacions.
The tomb, to me, seems to be a later structure, perhaps erected by an invading force to claim and defile the previous inhabitants sacred centre. When I stated this I was told that one possible translation of Listoghil is 'The Fort of the Overthrow'.
The chamber is very different to anything else at Carrowmore. It seems to be more of a proto-wedge-tomb than anything else. Eight large stones form the walls and a large slab covers the entire area. A few odd boulders under the cairn were interpreted by the excavators as possible signs of an earlier structure.
It is not possible to get to the tomb itself now, but a viewing gallery has been erected so that you can look down onto it. It is one of the only carved structures in Sligo, with a wave-like motif on the front edge of the capstone and an 'Om'-like carving on the inside of the doorstone.
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This is an explanation of (and a bit of a disclaimer for) the coordinates I provide.
Where a GPS figure is given this is the master for all other coordinates. According to my Garmin these are quite accurate.
Where there is no GPS figure the 6 figure grid reference is master for the others. This may not be very accurate as it could have come from the OS maps and could have been read by eye. Consequently, all other cordinates are going to have inaccuracies.
The calculation of Longitude and Latitude uses an algorithm that is not 100% accurate. The long/lat figures are used as a basis for calculating the UTM & ITM coordinates. Consequently, UTM & ITM coordinates are slightly out.
UTM is a global coordinate system - Universal Transverse Mercator - that is at the core of the GPS system.
ITM is the new coordinate system - Irish Transverse Mercator - that is more accurate and more GPS friendly than the Irish Grid Reference system. This will be used on the next generation of Irish OS maps.