Looking over the spread of the site ,12 of the 15 cairns can be incorporated into the mirror plan at its location. Since Orion is a winter constellation it backdrops Carrowkeel from any location North of the site. The outline looks a little skewed. I asked Dr. Gurshtein about how constellations may have changed their outline appearance over millennia. He maintained that there would little if any change in the overall outline of a constellation. If it was planned they may have taken into account the 3 dimentional spacing of the stars as they would have appeared in Neolithic times.

So where would they have sighted from, to 'ground' the stars, so to speak. Is it a coincidence that all of the cairns in questions here are spread out on three finger ridges, most of Orion's stars are spread out on three almost parallel stellar groupings? Maybe the fact that the land area on that high elevation was scarce so they were left with little room to manoeuvre the settings of the cairns, but remember most of these cairns step down their respective spurs. Delibrate? The answer appears to lie with our Doomore Hillock once again, and a return to our night time alignment theory. Doomore is 4.14 statute miles from the main groupings of cairns (X,G,H,K,L).

Lighting beacon fires on that slope on Carrowkeel, could observers on Doomore see 3 separate fires? Cairns K and L are at 320m. Cairn X about 282m, only a height difference of 38m. Is it enough of a difference to view from 4.14 miles away? I think its possible but it needs surveying to prove it or eye observation. However only one fire would have been necessary to fix a single point on the slope. Subsequent points could be fixed later. The advantage of Doomore Hillock is its proximity and the fact anybody there could see the Orion constellation overhead. Would they have needed to do this? Why not use the slope on Carrowkeel itself?

The problem with that is you have this alignment to the setting sun to incorporate, Capella again being used and some of the slopes of the other cairns are hidden from the central ridge. Either way it makes for a more well integrated plan that our Neolithic observers came up with. The tantalising idea about this is a fire from any distance would appear as scintillatiing or twinkling like a star in the night sky. This also addresses an interesting story that concerns the cairns at Carrowkeel referred to as 'white' cairns. Their 'whiteness' coming from the addition of quartz minerals as a covering for the mounds. Quartz has prismatic qualities, it can reflect sunlight, although the arguement of seeing sunlight reflected from the cairns at great distances is probably not true, but up close in their prestine state, they may indeed have reflected light to illustrate their importance to visitors.

I've included a ruined cairn X in the picture here , as X is almost equidistant from H and H equidistant from K, mirroring the uniformity of Orion's belt. You will also note that the builders, if they did indeed set up Carrowkeel like this, choose to include 4th and 5th magnitude stars from Orion into the ground plan. There is however a missing cairn location for the big red giant star, Belelgeuse. Could the ringfort at the edge of Doonaveragh Plateau be that cairn? Did later defenders of that region simply rearrange a ready supply of stone to make up the fort?