On 19 April 2004 15:13, Charlie Petersen wrote: > Sigurd, I was surprised when I was there at the wonderful > condition of all the ruins - still standing after all this > time - the stones weathered, but not eroded very much, > considering how old they are. Is this due to the Orkney > climate? Lack of air pollution? Durability of the stone I suspect. The sites closer to the coast usually don't fare as well. Sea erosion is a particular problem. -- Sigurd Towrie Blackhall - Kirbister - Stromness - Orkney Heritage of Orkney: www.orkneyjar.com Home: sigurd@orkneyjar.com Work: sigurd.towrie@orcadian.co.uk