such unanimity existed with regard to Teotihuacan. Neither the Street of

  the Dead, nor the Temple of Quetzalcoatl, nor the Pyramids of the Sun

  and the Moon had ever been definitively dated.23 The majority of scholars

  believed that the city had flourished between 100 BC and AD 600, but

  others argued strongly that it must have risen to prominence much

  earlier, between 1500 and 1000 BC. There were others still who sought,

  largely on geological grounds, to push the foundation date back to 4000

  BC before the eruption of the nearby volcano Xitli.24

  Amid all this uncertainty about the age of Teotihuacan, I had not been

  surprised to discover that no one had the faintest idea of the identity of

  those who had actually built the largest and most remarkable metropolis

  ever to have existed in the pre-Colombian New World.25 All that could be

  said for sure was this: when the Aztecs, on their march to imperial power,

  first stumbled upon the mysterious city in the twelfth century AD, its

  colossal edifices and avenues were already old beyond imagining and so

  densely overgrown that they seemed more like natural features than

  works of man.26 Attached to them, however, was a thread of local legend,

  passed down from generation to generation, which asserted that they had

  been built by giants27 and that their purpose had been to transform men

  into gods.

  21 The Ancient Kingdoms Of Mexico, p. 74; The Traveller’s Key To Ancient Egypt, pp. 11035.

  22 See, for example, Ahmed Fakhry, The Pyramids, University of Chicago Press, 1969.

  23 Mysteries of the Mexican Pyramids, pp. 230-3.

  24 Ibid.

  25 The Prehistory of the Americas, p. 282.

  26 Mysteries of ‘the Mexican Pyramids, pp. 11-12.

  27 Ibid.

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  Hints of forgotten wisdom

  Leaving the Temple of Quetzalcoatl behind me, I recrossed the Citadel in

  a westerly direction.

  There was no archaeological evidence that this enormous enclosure had

  ever served as a citadel—or, for that matter, that it had any kind of

  military or defensive function at all. Like so much else about Teotihuacan

  it had clearly been planned with painstaking care, and executed with

  enormous effort, but its true purpose remained unidentified by modern

  scholarship.28 Even the Aztecs, who had been responsible for naming the

  Pyramids of the Sun and the Moon (an attribution which had stuck though

  no one had any idea what the original builders had called them) had

  failed to invent a name for the Citadel. It had been left to the Spaniards to

  label it as they did—an understandable conceit since the 30-acre central

  patio of La Ciudadela was surrounded by massively thick embankments

  more than 23 feet high and some 1500 feet long on each side.29

  My walk had now brought me to the western extreme of the patio. I

  climbed a steep set of stairs that led to the top of the embankment and

  turned north on to the Street of the Dead. Once again I had to remind

  myself that this was almost certainly not what the Teotihuacanos

  (whoever they were) had called the immense and impressive avenue. The

  Spanish name Calle de los Muertos was of Aztec origin, apparently based

  on speculation that the numerous mounds on either side of the Street

  were graves (which, as it happened, they were not).30

  We have already considered the possibility that the Way of the Dead

  may have served as a terrestrial counterpart of the Milky Way. Of interest

  in this regard is the work of another American, Alfred E. Schlemmer,

  who—like Hugh Harleston Jr.—was an engineer. Schlemmer’s field was

  technological forecasting, with specific reference to the prediction of

  earthquakes,31 on which he presented a paper at the Eleventh National

  Convention of Chemical Engineers (in Mexico City in October 1971).

  Schlemmer’s argument was that the Street of the Dead might never

  have been a street at all. Instead, it might originally have been laid out as

  a row of linked reflecting pools, filled with water which had descended

  through a series of locks from the Pyramid of the Moon, at the northern

  extreme, to the Citadel in the south.

  As I walked steadily northward towards the still-distant Moon Pyramid,

  it seemed to me that this theory had several points in its favour. For a

  start the ‘Street’ was blocked at regular intervals by high partition walls,

  at the foot of which the remains of well-made sluices could clearly be

  seen. Moreover, the lie of the land would have facilitated a north-south

  28 Ibid., p. 213.

  29 Ibid.

  30 The Ancient Kingdoms of Mexico, p. 72.

  31 Mysteries of the Mexican Pyramids, pp. 271-2.

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  hydraulic flow since the base of the Moon Pyramid stood on ground that

  was approximately 100 feet higher than the area in front of the Citadel.

  The partitioned sections could easily have been filled with water and

  might indeed have served as reflecting pools, creating a spectacle far

  more dramatic than those offered by the Taj Mahal or the fabled Shalimar

  Gardens. Finally, the Teotihuacan Mapping Project (financed by the

  National Science Foundation in Washington DC and led by Professor Rene

  Millon of the University of Rochester) had demonstrated conclusively that

  the ancient city had possessed ‘many carefully laid-out canals and

  systems of branching waterways, artificially dredged into straightened

  portions of a river, which formed a network within Teotihuacan and ran

  all the way to [Lake Texcoco], now ten miles distant but perhaps closer in

  antiquity’.32

  There was much argument about what this vast hydraulic system had

  been designed to do. Schlemmer’s contention was that the particular

  waterway he had identified had been built to serve a pragmatic purpose

  as ‘a long-range seismic monitor’—part of ‘an ancient science, no longer

  understood’.33 He pointed out that remote earthquakes ‘can cause

  standing waves to form on a liquid surface right across the planet’ and

  suggested that the carefully graded and spaced reflecting pools of the

  Street of the Dead might have been designed ‘to enable Teotihuacanos to

  read from the standing waves formed there the location and strength of

  earthquakes around the globe, thus allowing them to predict such an

  occurrence in their own area’.34

  32 Ibid., p. 232.

  33 Ibid., p. 272.

  34 Ibid.

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  Reconstruction of Teotihuacan, looking down the Way of the Dead

  from behind the Pyramid of the Moon. The Pyramid of the Sun lies to

  the left of the Way of the Dead. Visible in the distance beyond it is

  the pyramid-temple of Quetzalcoatl inside the large compound of the

  citadel.

  There was, of course, no proof of Schlemmer’s theory. However, when I

  remembered the fixation with earthquakes and floods apparent

  everywhere in Mexican mythology, and the equally obsessive concern

  with forecasting future events evident in the Maya c
alendar, I felt less

  inclined to dismiss the apparently far-fetched conclusions of the

  American engineer. If Schlemmer were right, if the ancient Teotihuacanos

  had indeed understood the principles of resonant vibration and had put

  them into practice in seismic forecasting, the implication was that they

  were the possessors of an advanced science. And if people like Hagar and

  Harleston were right—if, for example, a scale-model of the solar system

  had also been built into the basic geometry of Teotihuacan—this too

  suggested that the city was founded by a scientifically evolved civilization

  not yet identified.

  I continued to walk northwards along the Street of the Dead and turned

  east towards the Pyramid of the Sun. Before reaching this great

  monument, however, I paused to examine a ruined patio, the principal

  feature of which was an ancient ‘temple’ which concealed a perplexing

  mystery beneath its rock floor.

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  Chapter 23

  The Sun and the Moon and the Way of the Dead

  Some archaeological discoveries are heralded with much fanfare; others,

  for various reasons, are not. Among this latter category must be included

  the thick and extensive layer of sheet mica found sandwiched between

  two of the upper levels of the Teotihuacan Pyramid of the Sun when it

  was being probed for restoration in 1906. The lack of interest which

  greeted this discovery, and the absence of any follow-up studies to

  determine its possible function is quite understandable because the mica,

  which had a considerable commercial value, was removed and sold as

  soon as it had been excavated. The culprit was apparently Leopoldo

  Bartres, who had been commissioned to restore the time-worn pyramid

  by the Mexican government.1

  There has also been a much more recent discovery of mica at

  Teotihuacan (in the ‘Mica Temple’) and this too has passed almost

  without notice. Here the reason is harder to explain because there has

  been no looting and the mica remains on site.2

  One of a group of buildings, the Mica Temple is situated around a patio

  about 1000 feet south of the west face of the Pyramid of the Sun. Directly

  under a floor paved with heavy rock slabs, archaeologists financed by the

  Viking Foundation excavated two massive sheets of mica which had been

  carefully and purposively installed at some extremely remote date by a

  people who must have been skilled in cutting and handling this material.

  The sheets are ninety feet square and form two layers, one laid directly

  on top of the other.3

  Mica is not a uniform substance but contains trace elements of different

  metals depending on the kind of rock formation in which it is found.

  Typically these metals include potassium and aluminum and also, in

  varying quantities, ferrous and ferric iron, magnesium, lithium,

  manganese and titanium. The trace elements in Teotihuacan’s Mica

  Temple indicate that the underfloor sheets belong to a type which occurs

  only in Brazil, some 2000 miles away.4 Clearly, therefore, the builders of

  the Temple must have had a specific need for this particular kind of mica

  and were prepared to go to considerable lengths to obtain it, otherwise

  they could have used the locally available variety more cheaply and

  simply.

  Mica does not leap to mind as an obvious general-purpose flooring

  1 Mysteries of the Mexican Pyramids, p. 202.

  2 Ibid. The Pyramids of Teotihuacan, p. 16.

  3 The Pyramids of Teotihuacan, p. 16.

  4 Encyclopaedia Britannica, 8:90, and The Lost Realms, p. 53.

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  material. Its use to form layers underneath a floor, and thus completely

  out of sight, seems especially bizarre when we remember that no other

  ancient structure in the Americas, or anywhere else in the world, has

  been found to contain a feature like this.5

  It is frustrating that we will never be able to establish the exact

  position, let alone the purpose, of the large sheet that Bartres excavated

  and removed from the Pyramid of the Sun in 1906. The two intact layers

  in the Mica Temple, on the other hand, resting as they do in a place

  where they had no decorative function, look as though they were

  designed to do a particular job. Let us note in passing that mica

  possesses characteristics which suit it especially well for a range of

  technological applications. In modern industry, it is used in the

  construction of capacitors and is valued as a thermal and electric

  insulator. It is also opaque to fast neutrons and can act as a moderator in

  nuclear reactions.

  Erasing messages from the past

  Pyramid of the Sun, Teotihuacan

  Having climbed more than 200 feet up a series of flights of stone stairs I

  reached the summit and looked towards the zenith. It was midday 19

  May, and the sun was directly overhead, as it would be again on 25 July.

  On these two dates, and not by accident, the west face of the pyramid

  was oriented precisely to the position of the setting sun.6

  A more curious but equally deliberate effect could be observed on the

  equinoxes, 20 March and 22 September. Then the passage of the sun’s

  rays from south to north resulted at noon in the progressive obliteration

  of a perfectly straight shadow that ran along one of the lower stages of

  the western façade. The whole process, from complete shadow to

  complete illumination, took exactly 66.6 seconds. It had done so without

  fail, year-in year-out, ever since the pyramid had been built and would

  continue to do so until the giant edifice crumbled into dust.7

  What this meant, of course, was that at least one of the many functions

  of the pyramid had been to serve as a ‘perennial clock’, precisely

  signalling the equinoxes and thus facilitating calendar corrections as and

  when necessary for a people apparently obsessed, like the Maya, with the

  elapse and measuring of time. Another implication was that the masterbuilders of Teotihuacan must have possessed an enormous body of

  astronomic and geodetic data and referred to this data to set the Sun

  Pyramid at the precise orientation necessary to achieve the desired

  equinoctial effects.

  5 The Pyramids of Teotihuacan, p. 16.

  6 Mexico: Rough Guide, p. 217.

  7 Mysteries of the Mexican Pyramids, p. 252.

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  This was planning and architecture of a high order. It had survived the

  passage of the millennia and it had survived the wholesale remodelling of

  much of the pyramid’s outer shell conducted in the first decade of the

  twentieth century by the self-styled restorer, Leopoldo Bartres. In addition

  to plundering precious evidence that might have helped us towards a

  better understanding of the purposes for which the enigmatic structure

  had been built, this repulsive lackey of Mexico’s corrupt dictator Porfirio

  Diaz had removed the outer layer of stone, mortar and plaster to a depth

  of more than twenty feet from the entire northern, eastern and southern
/>
  faces. The result was catastrophic: the underlying adobe surface began to

  dissolve in heavy rains and to exhibit plastic flow which threatened to

  destroy the whole edifice. Although the slippage was halted with hasty

  remedial measures, nothing could change the fact that the Sun Pyramid

  had been deprived of almost all its original surface features.

  By modern archaeological standards this was, of course, an

  unforgivable act of desecration. Because of it, we will never learn the

  significance of the many sculptures, inscriptions, reliefs and artefacts that

  had almost certainly been removed with those twenty feet of the outer

  shell. Nor was this the only or even the most regrettable consequence of

  Bartres’s grotesque vandalism. There was startling evidence which

  suggested that the unknown architects of the Pyramid of the Sun might

  have intentionally incorporated scientific data into many of the key

  dimensions of the great structure. This evidence had been gathered and

  extrapolated from the intact west face (which, not accidentally, was also

  the face where the intended equinoctial effects could still be seen), but

  thanks to Bartres, no similar information was likely to be forthcoming

  from the other three faces because of the arbitrary alterations imposed

  upon them. Indeed, by drastically distorting the original shape and size of

  so much of the pyramid, the Mexican ‘restorer’ had possibly deprived

  posterity of some of the most important lessons Teotihuacan had to

  teach.

  Eternal numbers

  The transcendental number known as pi is fundamental to advanced

  mathematics. With a value slightly in excess of 3.14 it is the ratio of the

  diameter of a circle to its circumference. In other words if the diameter of

  a circle is 12 inches, the circumference of that circle will be 12 inches x

  3.14 = 37.68 inches. Likewise, since the diameter of a circle is exactly

  double the radius, we can use pi to calculate the circumference of any

  circle from its radius. In this case, however, the formula is the length of

  the radius multiplied by 2pi. As an illustration let us take again a circle of

  12 inches diameter. Its radius will be 6 inches and its circumference can

  be obtained as follows: 6 inches x 2 x 3.14 = 37.68 inches. Similarly a

  circle with a radius of 10 inches will have a circumference of 67.8 inches