Rhiannon wrote: Well that's my point, surely? That noon is an objective thing, when the sun's at its highest. And therefore, if you were going to carve a notch to indicate when it was, you'd think you'd carve it where the light indicates noon, not a small time before that.
Forgive me Rhiannon, I obviously still haven't made it clear.
The notch is in such a perfect position that when the sun is at it's highest point in the sky, the shadow of the capstone falls exactly on it... you have to forget the time as indicated by modern clocks.
We had an expert mathematician calculate from charts at what time the sun would be at it's highest point in the sky at 4.2 degrees west of the Greenwich Meridian. He told us that would happen at 13.19 - and that's exactly what time it was when the shadow fell across the notch!
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