Has anybody mentioned this site before?
It deals with the bluestones and the connection with water and sound.
http://www.landscape-perception.com/a_s ... holy_land/
Professor Timothy Darvill, co-director with Geoffrey Wainwright of the current archaeological survey of Preseli, S.P.A.C.E.S. (Strumble-Preseli Ancient Communities and Environment Study), and consultant to the Landscape and Perception Pilot Study, refers to an interesting element in the 12th-Century account of Geoffrey of Monmouth (see The Story of the Bluestones). In this, Geoffrey uses the myth of Merlin bringing the stones to Stonehenge to state that the stones had medicinal properties that could be accessed by washing the stones and then pouring the water into baths. The water absorbed the healing virtues of the stones. There is a folk belief in Pembrokeshire even today that the Preseli bluestones possess healing qualities.
S.P.A.C.E.S. soon found that the distribution of holy wells in the Preselis, and in west Wales generally, is dense. Many such springs and wells are believed to have healing properties. The survey noted about a dozen springs issuing out of the mountain immediately around the edge of the dolerite outcrops such as Carn Menyn. Of those that S.P.A.C.E.S. have found, a few are “enhanced springheads”, enhanced in the sense that the water source has been cleared out and enlarged, and a little wall has usually been built thus creating a pool where the water emerges. This indicates that such a spring was viewed as special and that the ancient people who so viewed it wished to obtain water at source, as it came out of the ground, Mother Earth, rather than further down the mountain where it becomes a rivulet and so less pure.
The site has been involved in 'acoustic mapping' and have produced field recordings of the sounds various stones make when struck.