A String of Ideas Continued... To my surprise and delight out popped the following set of numbers. 100, 200, 300,  400, 500, 600, 700. So 12 ½ MY = 100 M Hands. That looked like a more rational  and intentional sequence and unexpectedly showed a use of a decimal system. So,  despite the fact that the MY seemed to be divided into eighths (MH) and thirty two  M Inches, some of the calculations were done in tens and hundreds. It looked as if  the measuring system was based on halving and rehalving a basic unit but the  calculating system was different.  However this was not the end of my journey of discovery. A few years previously I  had met Martin Brennan with John Michell at the Leyhunter Moot in Hereford and  had become very interested in the work Martin had done in the Boyne Valley in  Ireland.  Part of his work led him to propose, in his first book Boyne Valley Vision, that the  builders and carvers of the beautiful and enigmatic designs on the stones of the  mounds and chambers at New Grange, Knowth and Dowth had used two short and  interrelated measures which he called A and B.  A measured 1.0125” and B was 1.4464”. Both subdivisions of a larger “C” measure  of 20.25”. Now, because his A measure was quite close to my MI or “thumb” of  1.02” and the ratio between that and Thom’s MI of .816” was exactly 5:4 perhaps  there was a similar relationship between the ancient Irish measures that Martin had  identified and the British ones.  As I examined a series of Pythagorean triangles some interesting figures began to  appear. If a 3,4,5 triangle is drawn with an hypotenuse of one MY the opposite side  is 20.4”. Not far from Martin’s C and exactly twenty of my M Thumbs. If the C  measure was really 20.4” and the A was 1.02 then, by the root 2 calculation that  Martin used B would be  1.4425”. Pretty close to  the value that he  proposed. However the  two important common  dimensions remain the  “thumb” of 1.02” and  the “cubit” of 20.4”  which relates through  the 3,4,5 triangle to the  Megalithic Yard.  Alexander Thom has also suggested that a  length of 2.5 MY, which he called the  Megalithic Rod, was used by the builders of the  rings, mounds and dolmens of the Neolithic and  early Bronze age. Two and a half MY is 6’ 9  1/2”, a handy size for a surveyors rod. It would  look like the ones seen in the hands of the Long  Man of Wilmington and is also 20 M Hands  long. I can clearly visualize such a staff or rod,  marked with hands, subdivided into thumbs  being carried and used by one of the “wise”  women or men four or five thousand years ago. © Jon Appleton 2010 under construction Cubit Yard (Ell) Jon Appleton This site brings together a kaleidoscope of ideas derived from 60 years of enquiry: it shares insights into fields as disparate as:- Archaeology, Landscape alignments, Megaliths, Henges, Prehistoric measurement, Astronomy, Mythology, Calendars of the past and Seasonal celebration.      thumb inch Click here to contact Jon