Durrington Wall's Henge, like it's smaller counterpart, Stonehenge, was built to be slightly elliptical. A circle that will fully encompass the exterior perimeter of the site, while skimming the most extreme outer limits of the embankments. is 1701-feet in diameter. An inner circle that best describes the largest across-site dimension is 1417.5-feet in diameter. Although the embankments are elliptical, rather than perfectly round, from these two precisely executed, coded ovals, the exact centre of Durrington Walls Henge can be determined to reside at or very near to: Latitude 51.192489 Longitude -1.786540.

A yellow circle of 1701-feet best describes the outer limits of Durrington Walls Henge, whereas the inner dimension (green circle) is best described as 1417.5-feet. Both of these values are very strong lunar codes that recur often on code-bearing sites across the world. For example:

From the epicentre of Durrington Walls Henge the due East sight-line resolves in the "V" saddle between mounds @ a distance of 17010-feet. One assumes that this very precise fix onto an outer-marker could be seen from the henge. Such a direct line of sight would mean that ancient alidade sighting rules (theodolites) could then be set to accurately determine the angle to any landmark or purpose-placed, outlying mound within 360-degrees of vista.

From the centre of Durrington Walls Henge one looked due East, over a surveying marker structure erected on the eastern embankment crest to the outer marker situated exactly 3.24 Greek miles away. From this sight-line, all theodolite devices could be accurately set.

But that wasn't the preeminent surveying fix point.

Barbury Castle, considered to be a hillfort from the Iron Age, sits perfectly due North (360-degrees), centre to centre, from Durrington Walls Henge. This hillfort is located on the high Ridgeway, with commanding views and wide vistas in all directions. Due to its very elevated position it appears very likely that this distant hill crown was visible*, in clear weather conditions, from Durrington Walls Henge and constituted the outer-marker for precise fixes onto due North. The surveying evidence would suggest that the architectural and surveying choice of epicentre position for constructing Durrington Walls Henge was fully contingent upon the crown of this high northern hill near Swindon.

*Footnote: This researcher has sent a series of email requests to English Heritage, The National Trust and the Durrington Borough Council, asking if it is possible to see Barbury Castle Hill crown (in perfect weather conditions) from Durrington Walls Henge, as well as from other mound and henge locations (Stonehenge?) in the vicinity, but no answer has been forthcoming. If a kind, local resident can answer the question, or, better still, supply a photograph of Barbury Castle Hill appearing (ever-so-faintly?) on the distant horizon, this researcher would be eternally grateful and would post the information into this website article.

The same hill crown position sits 25920-feet ( 51/3rd Roman miles) and at an angle of exactly 36-degrees from the obelisk position at Avebury Henge, sufficient to to find true North with a theodolite or alidade sighting rule. The ancient number, 25920-years (360 X 72) was used to describe the duration of the Precession of the Equinoxes, where the sun spends 2160-years in each House of the Zodiac during the cycle of Precession.

A vector comes in from the main obelisk position at the centre of Avebury Henge's southern circle. This huge stone (found to be 21-feet long when measured by Stukely in the 1700's) protruded high above the henge walls and could be seen for miles around. The degree angle from its standing position to the centre of Barbury hill crown is precisely 36-degrees. The return angle back to Avebury is, therefore, 216-degrees. Note: the ancient reed measurement was 126-inches and the Greek foot was 12.6-inches. The ancient British bushel capacity was 2160 cubic inches and this was 1/10th of a Babylonian Homer volume @ 21600 cubic inches. The sun spends 2160-years in each House of the Zodiac during the cycle of Precession and the Moon is 2160-miles in diameter.

It appears that the exact positioning of Avebury Henge's huge obelisk and, indeed the position of the entire henge was co-dependant on the position of Barbury Hill's crown position.

The preliminary evidence suggests that the Neolithic Age architects and designers of Durrington Walls Henge found a suitable position aside the Avon River, which also gave perfect North and East fixes onto prominent and eternal landmarks. By this occurrence, calibrated surveying instruments could first be set with high precision before secondary surveying positions (outlying mounds, standing stones or post circles) were precisely placed in the regional landscape at pre-designed distances and angles out from the centre of Durrington Walls Henge.


A dynamic surveying relationship exists between the epicentre of Durrington Walls Henge and the top of Silbury Hill. The distance separating these two surveying points was intended to convey 82944-feet (as seen above on the Google Earth panel). With the equatorial size of the Earth anciently set to the formula 12 X 12 X 12 X 12 X 1.2 = 24883.2-miles, the sum of 8294.4-miles would constitute 1/3rd of the distance around the Earth or 120-degrees of equatorial arc. This distance being encoded between structures in Wiltshire, Southern England equates to 48000 of the largest Egyptian Royal Cubits @ 20.736-inches each. This increment of length was positively identified by Sir William Flinders Petrie to be present in the length of the coffer found in the Khafre Pyramid of Egypt. The coffer measured 103.68-inches or 5 cubits of 20.736-inches each.

Depending upon which navigational system one was using for positional plotting at sea, the above distance (82944-feet) would represent the following fractions of the equatorial circumference of the Earth:

Alternatively, the return angle to the epicentre of Durrington Walls Henge is 168.75-degrees and this value is dynamic lunar cycle and navigational coding simultaneously. For example: A lunar year equates to 354.375-days or 21 periods of 16.875 days (405-hours).

The above amount of error in the coded or intended distance between epicentres of the two Neolithic Age structures might equate to about 40-feet in close to 153/4 miles. Any detectible error in the coded degree angle is negligible. The prowess and accuracy of these ancient surveyors is astonishing.

Similarly, while the ancient astronomer surveyors were accurately configuring a line-of-sight position to represent due East @ 17010-feet from the epicentre of Durrington Walls Henge, they also built a structure to dually represent the PHI ratio (1.6180339 to 1), as well as another ratio attributable to any 3,4,5 triangle. At the top of the picture a white line, extending out from the epicentre of Durrington Walls Henge, resolves upon a purpose built mound situated at a distance that was intended to mnemonically and measurably code 16180.34-feet, at an angle around from North of 83.33333-degrees. In any 3,4,5 triangle, the shortest side will be 1.66666666 less in length than the longest side. The sum of 1.66666666 is .83333333 X 2. Thus two very important ratios, copiously used by ancient Caucasoid civilisations, are eternally preserved in the position of this purpose built mound.

It is worthy to note that this mound would have been dual coded and read, also, as 16200-feet (rounded PHI). The sum of 1.62 X 2 = 3.24 (another essential factorable value in the ancient parcel of numbers. Remember, the due East marker-mounds below this one sit 3.24 Greek miles out from the centre of Durrington Walls Henge ... and were so erected in the English landscape from about 2000-years before there was a Greek civilisation ... so who had the so-called Greek measurement system first?

Alternatively, the very important value of 17010-feet built into the dual-mound outlying position due East of Durrington Walls Henge, relates to the Lunar Nutation cycle of 6804-days duration. The sum of 1701-days would be 1/4th of the cycle.

The degree angle from the centre top of Silbury Hill to the centre of Barbury Hill crown is 32.36068-degrees or twice 16.18034. That same distance between the two ancient trig markers was 30240-feet or 5-minutes of equatorial arc for the world.

A yellow vector, originating on the top of Silbury Hill is seen to resolve into the central region of Barbury Castle Hillfort (easily seen from Silbury Hill), on the high Ridgeway. The angle (32.36068-degrees) is pure PHI-based coding, whereas the distance is navigation-based. A white line is seen to resolve into the centre crown area of Barbury Hill and this originates at the main obelisk position at Avebury Henge. The distance is exactly 25920-feet (coding the duration, in years, of the Precession of the Equinoxes) and the angle is 36-degrees (return angle 216-degrees). The centre crown of Barbury Hill also represents "true" or "due" North from the centre of Durrington Walls Henge, 20-miles to the South.

Yet another major station position that determined the epicentre of Durrington Walls Henge was the centre of Stonehenge, 10368-feet distant, with an accuracy of within 7-feet overall . This distance is 1 53/55th British Standard Miles. The coded degree angle back from Stonehenge is 61.25-degrees, a strong navigational code.

The coding contained within the ancient number 10368 relates to the equatorial size of the Earth and also the speed at which the Earth rotates. This is one of the most important values of antiquity, thus Stonehenge, as the preeminent site standing off from Durrington Walls Henge was awarded the honour of carrying this number.

So, where have we seen this number before?

This very impressive stepped stone pyramid is called variously the Gaogouli Pyramid or the Tomb of the General. It is situated to the North of Korea at Ji'an, Jlin, China at coordinates Lat: 41.157650, Long: 126.226400.

This Chinese-Korean Pyramid is officially said to have a square base measurement of 31.58 metres per side. It also has a series of obelisk stones leaning against the base, the tallest of which has been measured at 4.5 metres .X 2.7 metres. The pyramid's square base is offset from the cardinal points of the compass and its eastern side appears to orientate towards north at an intended azimuth angle of 314.16-degrees (coding PI @ 3.1416).

The measurement standard by which it was built is recognisable within the factorable number system and universal measurement standards used by the Caucasian cousin nations since remote antiquity and up until modern times. Consider the following:

1. The base length of 31.58 metres easily converts to 103.68' (10317/25ths) or 1244.16" (12444/25ths).

2. This length is equivalent to 60 of the largest of the Egyptian Royal Cubits @ 1.728' (20.736" ... 2092125ths). Sir William Flinders Petrie identified usage of this particular cubit in his measurement of the coffer in the Khafre Pyramid, wherein it was 5 of these cubits long or 103.68-inches. Note: A cubic foot (12 X 12 X 12 inches) = 1728 cubic inches. Also the base circumference of Silbury Hill in England is 1728', based upon a diameter of 550'.

3. The "Cab" volume,within the Jerusalem liquid volume standard was 103.68 cubic inches.

4. The "Stirling Jug" standard capacity volume of Scotland was 103.68 cubic inches.


It is coding the equatorial size of the Earth and principles related to navigation across the vast, featureless oceans of the world. It is also coding the speed at which the Earth rotates each hour, which leads to an understanding of an accurate chronology system for measuring the daily passage of time. Here's how it works:

1. The ancient way of reckoning and remembering the equatorial size of the Earth was 12 X 12 X 12 X 12 X 1.2-miles or 24883.2-miles. The half value of 24883.2 is 12441.6 or ten times the inch value generated on any one side of this pyramid.

2. If one circumnavigates the pyramid @ 103.68-feet per side , then the distance covered is 414.72' (41418/25ths). If this value were read symbolically as "miles" then that distance would by 1/60th of the equatorial circumference or 6° of arc.

3. With the Earth considered to be 24883.2-miles in circumference its rate of speed in miles per hour is 24883.2 ÷ 24 hours = 1036.8 MPH.

4. The half value of 103.68* is 51.84 (5121/25ths) and the slope angle on the Great Pyramid of Egypt is 51.84° . The Great Pyramid @ 756' long is 72 Hebrew reeds in length. It therefore covers an area of 72 X 72 reeds or 5184. Alternatively, the sum of 51.84-years is 1/500th of the 25920-year duration of the Precession of the Equinoxes.

5. The azimuth angle that the Octagon of Newark Ohio, USA (a very sophisticated and large geometric earthmound complex) lies on is 51.84° .

6. When navigating at sea using the ancient British league of 16500' (3.125-miles of 5280') for linear legs of distance covered, the plotting circle generated per league was 51840'. This plotting circle was then fully divisible by 360° and as long as legs of straight line travel were done in accumulations of full leagues or lesser divisions thereof before a heading change, then accurate calculations related to positions at sea were easily facilitated. By this mathematical method the navigator could always keep track of the angle back to the point of departure or onwards to the destination.

It seems apparent that the height of the base tier of this pyramid was intended to represent 10.368' or 124.416", which again would act as a mnemonic device for remembering the equatorial circumference of the Earth and the speed of its rotation.

This pyramid, situated on the route from Western Europe to the Bering Strait and the Americas, is said to be thousands of years younger than the monuments at and around the Durrington Walls-Stonehenge complex.