Two great mathematical minds join to discover and reveal the most startling evidence that, long before Thales, ancient Britons were using sophisticated mathematics on the most incredible scale. It is foolish to dismiss the evidence as coincidence, as foolish as using a system of measure based on light-waves! Does anyone have a suitable laboratory, where I may check my metre?! I sense we were once much cleverer than now and a science of incredible importance has been lost, but here is a great step toward its recovery. It may be a while before my jaw returns from the floor!