Thanks Andy , Dunno if it's quite the same thing really , there is a lot of stuff blethered about alignments that when you investigate them they seem to disappear , although the Newgrange light box is one of the few examples we have of a genuine astronomical alignment and it is mainly due to that and the alignments at Nether Largie and Stonehenge that we can be sure that the interest and capability was there in the Neolithic.