gov,
you said...
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this goes back to the "secret" arts the Freemasons, Knights Templar, etc. used to build with. Their Math was a secret ."
Actually you are partially right but that 3-4-5 or as you stated 6-8-10 is ancient knowledge attributed to Pythagoras and illustrated with algebraical formulas, by Euclid, since isosceles triangles bridge geometry and algebra. the Egyptians found it, so did other civilizations.
A right triangle where the sides are in the ratio of the integers 3:4:5
This is one example of the many "pythagorean triples".
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Remember: it is the ratio of the lengths of the sides that counts, not the actual length. The units of measurement are thus irrelevant.
A Pythagorean triple has three positive integers a, b, and c, such that a2 + b2 = c2. In other words, a Pythagorean triple represents the lengths of the sides of a right triangle where all three sides have integer lengths.[1]
Evidence from megalithic monuments on the Northern Europe shows that such triples were known before the discovery of writing. Such a triple is commonly written (a, b, c). Some well-known examples are (3, 4, 5) and (5, 12, 13).
Not only is it used to square the building plates..which as you stated is used in construction from excavation AND the squaring of the corners of any type of construction but it is used to find an unknown spot on the ground. Which is why the Jesuits this formula.
If you are given either the 3 or the 4, you can find the 5. Any point of the isosceles right triangle can be plotted - any point can be used to bury the goods. as well of the center point of the triangle.
I think the closed 4 in the way it is formed is a subtle hint the triangle since the top part or close part of the 4 IS a 3-4-5 Pythagorean isosceles triangle!
However, not matter how deep we get into all of this, it still shows no reference to 4 meaning North.
I do see your point that your 4 is "pointing" toward the North and the river, but this is not confirmation but actually this lead you astray...I think is is a supposition on your part, coming from the fact that your first assumption - that the dots outlined a 4 for you. So an illogical premise lead to an unsubstantiated conclusion. Unless of course you can provide the reference to the number 4 meaning North. You will excuse my directness Sir in the name of dispelling any accidental or purposeful disinformation on the site. Thanks for your understanding. This not an attack on you, but in the pursuit of the truth, we tesoro dogs must sniff and sometimes bark!
hope this helps
rangler
http://Pythagorean theorem en.wikipedia.org/wiki/Pythagorean_triple
ps Thom, I know dogs dont like cats, is that why you let it out of the bag lol!!!!!
pps To clarify just a bit on the triple meaning of the 4, one of the meanings that I was able to
solve was with an open 4..this 4 is a closed 4 so it is a small point. but sometimes it is the small points that add up to the major point we need to solve the puzzle.
Without a picture showing the correct orientation, the area that feels like a target zone, will probably be way off at that distance. Triangulation should be the right way to land where you need. Seems like at this point, you should just take a compass reading to help keep you on track while you walk it off. Doesn't seem like declination would be an issue right now. 
