1964
The Great Isosceles Triangle of England
In 1961, Tony Wedd, an English UFOlogist who lives in Chiddingstone, Kent, brought out a small booklet "Skyways and Landmarks, which dealt with the surmised connection between leys, ancient monument alignments discovered in 1921 by Alfred Watkins, and orthoteny, Aime Michel's discovery of a straight-line pattern formed when UFO sightings from a flap in 1954 were taken on a 24-hour basis.

Since Skyways and Landmarks was published an organisation called The Ley Hunter's Club was set up under the chairmanship of Philip Heselton, of Sunbury, Middlesex. The objects were to form a national index of leys in England and to research into them. Much work was done in trying to investigate the connection with UFOs, but the trouble was that all leys so far found are in England and all orthotenies in France.

Then in 1964 the research of the Ley Hunter's Club bore fruit. A huge isosceles triangle was discovered covering many square miles of English countryside, a triangle of leys seeming to connect accurately with the only one of Michel's lines to cross the English coast, the Calais-Southend orthoteny.
 

The apex of the triangle is the ley centre of Arbor Low, Derbyshire, which is reputed to have fifty leys passing through it. From this two lines, each 152 miles long, run to Othery in Somerset and to the town of West Mersea, Essex. The mid-point of the line between Othery and West Mersea is the important Reading ley centre. The perpendicular from Reading to Arbor Low is 125 miles long, and, where it crosses the Calais-Southend orthoteny (which incidentally is parallel to the eastern side of the triangle) is ths spot where the famous Overseal Sighting took place. This occurred on September 13th, 1962; a Mrs.Jones saw a grey luminous object bigger than her car, just above the telegraph poles. It was curved underneath and the top was domed. After a few minutes it made a swishing sound and disappeared.

Another point to mention is that the Calais-Southend orthoteny passes through Canterbury Cathedral.

As well as the base-line of the triangle, there is another important ley passing through the Reading centre. This is the Bristol-London line which also passes through Avebury, a famous site of standing stones. This line has an enormous number of sightings within a mile or so each side of it, and seems to be a major route, crossing Swansea Bay, Bristol, Keynsham, Reading, London Airport, South London and the Thames Estuary. In practically every copy of Flying Saucer Review one will find several sightings on this line.

If we take a line from West Mersea at ninety degrees to the west side of the Triangle, we find that the line passes through Chiddingstone, the little Kent village mentioned earlier.

Even yet we do not know the real reason the UFOs use these leys (is it to navigate by, to draw power from, or for some different purpose perhaps beyond our imagining?)

http://www.leyhunt.fsnet.co.uk/lhunt64.htm