Sirius and the three giant henges served the same purpose for earth-bound observers – which it had clearly been intended to do. A rather tenuous possibility occurred to us almost immediately we had discovered the Sirius alignment with the henges. If those creating the super-henges had seen fit to reproduce Orion’s Belt on the Earth, might they not have also recreated Sirius as well? We knew there were other super-henges in the locality, some of which we had already identified and measured, but was there one in the place where Sirius should be (relative to the Thornborough henges) if it had been translated to the ground? With a little effort we answered the question to both our surprise and our delight. There was indeed a henge to be found directly in line with the southeastern entrances of the Thornborough henges. We had missed this particular henge before because it has been almost totally destroyed by many centuries of ploughing, though it can still be seen as parch marks in the soil when conditions are right. It seems to have once been a henge on the same proportions of those at Thornborough and it is near a place called ‘Cana Barn’. We measured the distance between the southern ‘Orion’s Belt’ henge and the Cana Barn henge to see if there was an interesting integer in Megalithic Seconds of arc. We were temporally mystified to discover that the distance from the centre of Thornborough henge C to the centre of the Cana Barn henge was almost exactly 10,000 m – as close as it was possible to measure this gap was 10 km. At first we dismissed this as being a rather incredible coincidence, until we remembered that there was 1,500 m between the centres of the two outer Thornborough henges. It was highly unlikely that two key dimensions could be in metres by random chance – yet how could these Stone Age henge builders have possibly used metres to lay out their henges? It was very strange, but far from impossible because metres are far more ancient that most people believe. Careful measurement of the distance between the third star in Orion’s Belt (Alnilam) and Sirius, as they appear in the sky, gave us the probable distance on the ground between Thornborough henge C and a hypothetical Sirius henge. As best as we could estimate a scale on the ground, the distance between Thornborough C and a Sirius henge should have been a little over 11 km. The actual distance between Thornborough C and Cana Barn henge being 10,000 m suggested to us that its positioning was of ritual importance. We also noticed on the sky maps that, although the stars of Orion’s Belt point more or less in the direction of Sirius, the ‘arrow’ is not exactly in line. When we transposed both Orion’s Belt and Sirius onto an aerial map of Thornborough and Cana Barn, we realized that, although the distance between Thornborough C and Cana Barn was not exactly proportionate with the stars, the offset alignment of the Cana Barn henge was in tune with the star pattern. In other words, there seemed no real doubt that Cana Barn super-henge was part of the same complex as Thornborough, and had been a definite – and quite startling – attempt to place Sirius on the landscape. As we have already recounted, thanks to the intervention of Edmund Sixsmith we were able to visit the site of the Cana Barn henge. And it was here that our thoughts drifted towards the Giza Plateau. Could the ancient Egyptians have copied this Orion’s Belt layout when they built the pyramids some 800 years after Thornborough? And could the Giza pyramids have a counterpart to Cana Barn henge? Neolithic Science and Technology Although archaeologists have suggested that the Thornborough henges could well be a representation of Orion’s Belt, what they have not done is to make any suggestion as to how the arrangement came to be so incredibly accurate. In the night sky the three stars cover a distance roughly equivalent to a human fist held at arm’s length. The slight