Prehistoric Surveying of the Landscape: The Evidence


An Illustrated Presentation given at Castle Henllys centre
on the 18th November 2015 at 7:30pm
by Robin Heath

What  were  megalithic  monuments  for?  

Despite  centuries  of  inquiry  by  archaeologists  and prehistorians  the  key  question  remains  unanswered.  Why  were  so   many  massive  stone  structures  erected  across  the  ancient  and  sacred  landscapes  of  the   world,  including  the  Preseli  region?

One  answer  to  this  innocent  question  lies  in  the  fact  that some  stone  circles   employ  the  same  geometrical  techniques as  do  surveyors  and  navigators.  This  fully illustrated talk shows how geometrical atterns became imprinted on the  local  and wider  landscape  of  Britain,  revealing  a  remarkable  purpose for the  megaliths,  a  purpose  based  on  the  importance  of location  ­‐‑  the  right  place.

Just  how  did  they  determine  the  right  place?  

Come along and find out, and have your present model of history recalibrated, as  we  also  discover  that  the  later  Celtic  and  Roman  Church  reapplied  the  ‘ʹpagan’ʹ  techniques  of  the  megalith  builders  to  suit  the  requirements  of  the  new   Christian  era,  ultimately  using  them  to  locate  Gothic  cathedrals.


Castell Mawr, Eglwyswrw, PembrokeshireHenllysTalk-3

HenllysTalk-2 For over thirty years, Robin Heath has looked for evidence of the science underpinning the culture of the megalithic monument builders. Over this period Robin has written ten books on ancient astronomy and geometry, and most recently has been engaged in research looking for evidence of larger geometrical patterns across the landscape, based on the location and placement of networks of ancient monuments. Previously having worked with John Michell and local antiquarian, the late John Sharkey, Robin has presented some of this material on TV documentaries, to megalithic tour groups, and also to students at the Prince’s School of Traditional Arts, John Ruskin College, Brasenose College, Oxford, the British School of Dowsing and the Faculty of Astrological Studies. He lives in the Preseli National Park, in Pembrokeshire.

The Annual Robert Cowley Memorial Lecture – 24th April 2015

The Annual Robert Cowley Memorial Lecture

Robin Heath Friday 24th April 2015

[The RILKO AGM will be held from 6.45 to 7.15 (Doors open 6.30pm)]
The public is warmly welcomed to the lecture at 7.30pm

Entrance: £8.00    (R.I.L.K.O. Members £6.00)

This illustrated lecture will present robust evidence that the world was surveyed and measured in prehistoric times. The technological residues from this activity will be shown to be recognisable in modern  times, and are found permeating presently employed measures, astronomical, geometrical and geodetic techniques and within prehistoric monuments, where this evidence remains almost completely unrecognised within archaeology. Find out why!

Robin Heath has a science degree and was a research and development engineer before becoming the head of technology at Coleg Ceredigion. The author of eleven books, he lectures widely on the subject of megalithic science and the evidence for ancient wisdom and has worked on projects with the media, John Michell and Paul Broadhurst, and his brother and fellow author Richard Heath.

The Research Into Lost Knowledge Organisation Public Lectures are held at
50 Gloucester Place, London W1U 8EA.

Nearest Underground Station: Baker Street
Buses: 2, 13, 30, 74, 82, 113, 139, 189, 274 pass outside.

Background and Context to Solstice Event at Small World Theatre, Cardigan

A (very) Brief History of some modern attempts to understand Stonehenge

Stonehenge evolved over fifteen centuries. The early phases of the monument began around 3150 BC and consisted of a 380 foot (115m) diameter circular bank, which created a ditch outside the circle. Inside the circular arena was an alignment to the solstitial sunrise, through a break in the bank to the Heel stone. A century later, 56 large holes were dug around the perimeter of an accurate 283 foot (86m) circle, now known as the Aubrey circle after the antiquarian John Aubrey, who discovered the remains of these holes. Current ideas are that these holes may once have held wooden posts or even bluestones.

About a century further on, a bluestone semi-circle was built in the centre, which had lintels carried aloft long 8ft slender uprights. This was truly a proto-Stonehenge, for in the middle of building this first architectural structure, a much more ambitious project was about the be initiated, that of hauling seventy five huge sarsen sandstones, some weighing in at forty tons, from the Marlborough Downs, twenty miles north of Stonehenge, near Avebury stone circle.  This became the 100 ft diameter sarsen circle and the trilithon horseshoe. Prior to the arrival of these monsters, perhaps around 2800 BC, four standing stones were placed around the perimeter of the Aubrey circle to define a ‘near perfect’ rectangle whose side lengths were in the ratio 5:12.

The sarsen structures at Stonehenge, the circle and the five bigger trilithons that rise up inside the circle, are the logo that everyone ‘sees’ when the word ‘Stonehenge’ is mentioned. However, this is a grandiose later structure, and the earlier phases are just if not more important. There are still the remains of most of the bluestones on site. Some were very polished, some still have the tenon or mortice joints that must have once enabled them to form a trilithon structure in the earlier bluestone ‘henge’. These recycled bluestones were later placed in a bluestone circle within the sarsen circle and in the horseshoe arrangement within the trilithons.

Stonehenge in Modern (post-Roman) Times

The link between Stonehenge and West Wales goes back much further than one might think,  Carmarthen-born legend Merlin is said to have claimed that the Stones arrived from Ireland, in a fanciful tale invoking giants, yet in his lifetime, West Wales was administered by the Irish and even the language spoken here was Irish. West Wales was, in effect, Ireland! But there’s another problem with Merlin’s tale – the stones to which he refers are the giant sarsen stones, which weigh up to 40 tons, not the bluestones which weigh in at a tenth of this.

In 1603 a local Pembrokeshire nobleman, George Owen, who, according to a brass plaque in Nevern church was ‘The Patriarch of English(!) Geologists’, made a connection between the stones and the design of Pentre Ifan and Stonehenge. And in 1655, Architect General to the King, Inigo Jones made the first well popularised (and very inaccurate plan) of the inner part of Stonehenge, for King James I.

Major archaeological surveys of the monument have been undertaken during the last two centuries. Sir William Flinders Petrie, the ‘father of modern archaeology’, accurately surveyed the inner part of Stonehenge in the 1870s, before he was twenty years old. In the early part of the twentieth century, Col Hawley spent years excavating the site, adding greatly to our knowledge of what Stonehenge had once been. In the 1950s professor Richard Atkinson, from UCSW, Cardiff, devoted many years to another major survey, and one outcome was his bestselling book called simply, Stonehenge, published in 1956 by Hamish Hamilton. In 1973, Atkinson asked ‘the father of modern archaeoastronomy’ professor Alexander Thom, to undertake ‘the most accurate survey ever undertaken of the monument at ground level’. It was done that year.

The Matter of the Bluestones

In the Preseli mountains of coastal West Wales, there are several volcanic outcrops that during the past ninety years have been identified as the source of the bluestone megaliths at Stonehenge. In 1923, Geologist Dr H H Thomas published an academic paper suggesting that many of the Stonehenge bluestones had come the Preselis. This discovered has fuelled along standing debate, acrimonious at times, as to whether these stones arrived at Stonehenge through deliberate human intent, or by the action of glacial flow.

Recent work by professor Mike Parker Pearson (UCL), and geologists from Aberystwyth University, has employed improved petrological analyis to begin the process of identifying the source of each of the bluestones that now remain at Stonehenge.

Supposing it can ever be proved that human endeavour was responsible for moving these 4 ton monsters all the way from Preseli to Salisbury Plain, then beyond marvelling at the engineering and cooperative skills shown by our distant ancestors, a much bigger question needs to be answered. That question is why they should have moved these stones over 150 miles? What purpose was being served by moving them?

An independent researcher and author of three books on Stonehenge, Robin Heath, has been working for over twenty-five years to find an answer to this question. He now claims to have found an answer, and that answer is to be found in the landscape of West Wales, near Newport, Pembrokeshire. In the summer of 2013 he discovered a previously unknown megalithic complex, a Proto Stonehenge, forging a second link between the Preseli region of Wales and Stonehenge, independent of the matter of the bluestones and how they got to Stonehenge.

This discovery, surveyed with modern theodolites, GPS and satellite imagery, reveals that Stonehenge was the end result of a long project undertaken over many centuries, whose goal was to develop a Neolithic technology capable of accurately measuring and recording time and space. Breathtakingly accurate, what has been discovered is a work of creative genius, completely lost until now and missing from our historical record. Once understood, it allows us to raise the capabilities of Neolithic culture to a new level, revealing a practical prehistoric science through which they integrated the rhythms and cycles of the sky we still experience on earth.

It is appropriate that the announcement of this discovery should be in the region of Wales where this took place, at the Small World Theatre in Cardigan, and also that it should take place during the midsummer solstice period, on Sunday June 22nd. A quite small exhibition with rather large models will also be available, and Robin’s new book, Proto-Stonehenge in Wales, will be launched in Wales to begin telling an exciting new story about how Stonehenge came to be, and how our ancestors forged the first beginnings of astronomy and surveying in West Wales.

Part of an interview and pre-event publicity document,
undertaken by Bill Hamblett, of the Small World Theatre.


Robin Heath is an independent researcher and an internationally published author of seven books on the subject of megalithic science, including four with Stonehenge in their title.  His book Stonehenge (Wooden Books, 2000) has remained a best-seller at the monument. He manages to get out quite a lot, usually with a theodolite. Other details are available at or

BOOKS: Robin Heath is the author of A Key to Stonehenge (1993), Sun, Moon & Stonehenge (1998), Sun, Moon & Earth (1999), A Beginner’s Guide to Stone Circles, Hodder-Headline (1999), Stonehenge (2000), The Measure of Albion (with John Michell, 2004) [reprinted as: The Lost Science of Measuring the Earth (2006)], Powerpoints (2007), and Bluestone Magic (2010). He has lectured widely, in Britain, Ireland and France, and for over twenty five years has undertaken tours, presentations, workshops and media interviews on the ancient sciences and the megalithic culture.


Secrets of Carningli Triangle

Photos of the Models Demonstrating Triangles at Launch Event

These are photos of a large plywood model, and proper hemp corded string. I like the lighting on them and they get the message across in four photographs. People will, of course need to understand that the Station stone rectangle contains an inherent lunation triangle, similarly constructed in units of either one or 8 megalithic yards (an eight year or a one year count respectively) of 2.722 feet, and that its dimensions are 40, 96 and 104 MY.


CITsecret2 CITsecret3 CITsecret4



Poster for this event

Given by Robin Heath B.Sc (hons)

An objective and scientific account  of the link between the Preseli bluestone site (the source of the Stonehenge bluestones) and the most famous megalithic monument in Europe.

at Glan Helyg, Llechryd, Cardigan, Ðyfed (three miles from Cardigan on the Newcastle Emlyn road)

STARTS: 7.30 pm on Friday the 13th of August 1993

A donation of £1 .00 (minimum) towards costs will include refreshments and programme notes

All Enquiries- telephone Cardigan (0239) 613224



Got those Preseli Blues, everybody’s talkin’, ‘bout those Preseli Blues’ from Those ol’ Preseli Blues‘, recorded by Bettws y Smith, and the Bluestones (Paramount, 1923)

It appears you can get away with almost anything in contemporary archaeology. One can for once agree with Jacquetta Hawkes who reckoned that ‘Every generation gets the Stonehenge it deserves’. In this generation one may gain permission to dig the hallowed turf of Stonehenge itself provided you have a theory that is zeitgeisty enough to woo the public. But does it hold water?

I am, of course, talkin’ ‘bout my gg..g..g.eneration of archaeologists, the Geoffrey Wainwright Experience, with Geoffrey himself on Mediaphone, accompanied by Tim Darvill on Vibes. Their opening track? “Cutting the First Sods for 50 Years at Stonehenge”

Compared with anything that has gone before in recent Stonehenge history, this ‘New Improved’ theory of why the bluestones were so important to the builders of Britain’s National Temple must appear as pure affrontery to ‘the lunatic fringe of dotty archaeology’, who have always thought that, free from the dogma that lurks in academic disciplines, they had sole rights to investigate whatever questions they liked on archaeological matters. In an apparent surge of ‘if you can’t beat them, join them’ mainstream archaeology now boldly appears to be straying into traditional loony fringe territory. We must welcome them – they may be healed by the process. The media love it, of course, fawning all over the two heroes of this piece of Stonehenge ‘science’. It is the perfect media story. Stonehenge sells – and is thus like a magnet to the media. Everyone knows about Stonehenge (except they don’t really know very much about it at all), it’s a World Heritage Site and it attracts nearly a million visitors a year who all come, pay their £5, and then learn very little about it. Despite all this brouhaha, the monument retains its title as one of the best solstice detectors in the known world.

Read Full PDF



The Heath Brother’s second survey report on Le Manio, in March 2010, has resulted in the first decent plan for the ‘Quadrilateral’ monument. From this comes valuable evidence suggesting the origin and length of the megalithic yard, showing it to result naturally from ‘day-inch’ counting of sun and moon cycles.
Were the archaeology profession ever to rekindle interest in why these massive monuments were built, this report would provide a major platform in providing sensible answers. For any study of the History of Science, this paper is a must-have bombshell, revealing unsuspected astronomical, geometrical and metrological skills from the prehistoric culture of Europe, prior to 4000 BC. [July 2011, PDF, 19 pages, 4.1 MB, free download]
CLICK HERE for The origin of the megalithic yard. [This is a large file. Allow time to download.]
As a result of encouraging feedback and interest in the results from the Heath Bros recent survey of le Manio, the original survey data is now available as a PDF file, free, gratis and for nothing on the S&L website.

CLICK HERE for full survey report [Again allow time to download}



This report began innocently enough as a diversion during our Spring 2010 survey (also available on this website). We noticed half a dozen symmetrical stones standing proud from the footpath near theQuadrilatere, at Le Manio. Arranged in a regular arc these stones were recorded and measured. This led to new and significant evidence of lunar astronomy having been practiced at this remarkable and virtually unknown site near Carnac, Brittany.

18 pages, free PDF download – 2MB.