Sacred Number

Avebury is directly North of Stonehenge, a monument made up to two types of stone, sandstone "sarsens" and granite "bluestones". The bluestones were found in west Wales, in the Preseli mountains and, as Robin Heath has shown, their source defines a Pythagorean triangle relative to Stonehenge, having side lengths 12:13:5. Thus the bluestones appear to have been consciously sourced since this triangle's 12 side is 12 units of 9 Royal miles (see my own Sacred Number and Robin's Stonehenge wooden book, Sun, Moon and Stonehenge and other works).

I recently obtained Fred Hoyle's On Stonehenge, and he shows R.J.C. Atkinson's "likely source for the bluestones from southwest Wales" [Stonehenge 1956] and then the "likely route for the transportation of Sarsen Stones" (shown below) which are thought to have come from near Avebury, which monument used many such stones.

The route also follows a significant triangle that was defined between Avebury and Stonehenge - giving a scaled version of three lengths found in the ubiquitous ancient model of the Earth (Chapter 3), the radius of the Pole, the Mean Earth and of the Equator - which is introduced in Sacred Number but first described by John Michell in The Measure of Albion (now reprinted as The Lost Science of Measuring the Earth: Discovering the Sacred Geometry of the Ancients by Robin Heath and John Michell).

My own figure 4-14 is shown to the right from Chapter 4 - Ancient Theme Parks. The point here is that the two types of stones, their sources within megalithic Britain and the two triangles form a single concept with Stonehenge at the centre. The monuments are all scaled in accordance with the Avebury-Stonehenge triangle using ancient metrology within exactly a quarter degree of latitude. This latitude of southern Britain, between 50 and 51 degrees, happens to express the length that every degree would have on the mean (spherical) Earth.

All of this being expressed more fully in Sacred Number except for this level of symbolic congruence regarding the stones themselves.