Sir Doktor Hatchison I apology for the time that I detain you, but I would like your opinion concerning the phenomenon Hatchison and certain observations that I have made. Allow me to present you the subject in brief. In Greece exists a mountain named “Penteli” for which existed, from old years, folklore reports on occult phenomena. One of the scientific explanations that have been given is that these are owed in the effect of low frequencies of sounds that unknown how they are produced in this specific mountain. The phenomena climax in a concrete cave in the quarry of marbles of Parthenon. In 1977 the NATO decided it makes underground central headquarters in the cave. At least this believe or support the Greek military and governmental authorities. The work itsself shows that they did not never have intention to make a military manufacture, not even stocking space. They have opened two obvious artificial tunnels in the marble, right and left the cave, which are supposed that they would advance until are linked with the cave, but did not advance beyond the maximum 50 measure depth the one and the 15 the other. Their conceivable extensions are cut provided that they precisely have address the one directed in the axis of north-south and the other in the axis of east-west, but very behind from the space of cave. The opinion that prevails in the inquiring circles is that it was experiment that aimed to use the naturally emitted frequency of sub-sounds for some unknown still reason. My observations in which I would like your opinion are: The tunnels are supported with iron rails in the form of cross-section H, which support the sheets-metal that cover their roof. In the one tunnel I observed the deformity that you see in the photograph. The rail has come off from the torch weld that it linked with her square base and it has been deformed with such plasticity that the logic says this should have become while they was soft for some reason. And this because it has come off only the front side of H, bent the internal side, but the back side it has remained completely detached! This excludes the probability of blow, because then it would be supposed come off the entire base and it would be moved, a little bit at least, the entire rail. The photographs do not show the deformity clean because the colour of rust flatten the differences of the curve. Almost close beside the deformed rail exists a curious "explosion " of the sheetsmetal of roof that presents the same plasticity. Furthermore, there are not exist traces of use of exposives or use of machine, neither in the hypertext cement neither in the sheets-metal. When I found out the phenomenon that has your name and read about it, I considered likely the alteration it was caused by the emission certain resembling with the phenomenon “frequencies Hatchison”, that could veer their target. In the same tunnel, between the rails and the sheets-metal have been embeded splinters of marble, size up to 20x10 cm, which deformed the sheet-metal and remained undamaged, even that they have much smaller degree of cruelty from this (I mean the sheet-metal). And these reminded me the swing of objects which found under by the Hatchison field, but also the acquisition of plasticity of metals. In the other tunnel do not exist deformities but only intense oxidation of rails. The sheets-metal in a lot of points litteraly have melted even if the water is dripping from the rocks of roof is little and also is limited only in the wintry months. Despite the intense oxidation of the iron however, the timbers that were used in order to support the rails are intact! In some of them the water with the rust drips on them and stains them but does not destroy them. In the description of Hatchison phenomenon I read that certain times is observed premature ageing of metals. What happens with the organic materials? Could all these, I described above, be attributed to the explosure in Hatchison field? And another question: have you ever observed phenomena of penetrability in hard material under the effect of Hatchison phenomenon? If you need more photographs or details, with my joy I will mail you. Dear doctor Hatchison, I hope you will find time to read my message, and to receive your answer even if you reject the hypothesis that I made. I thank you beforehand and also I apologize for the abuse of your precious time. Yours Sincerely Ioannis Triantafyllis natural material designer