Hi Richard et al,

You might be interested in checking out the following article on a watermill just unearthed on the river Thames at Greenwich.

The article can be found on pages 30-35 in the November 2009 edition of "Current Archeology" magazine. Part of this article can be read on line at :- http://www.archaeology.co.uk/articles/water-power-in-medieval-greenwich.htm

What they don't tell you in the on line version of the article is that the remnants of this Thames water mill have now been dendrodated to 1194 - that's early. The framework discovered employs tusk tenons in the construction. Mud would appear to have amazing preservative properties.

Regards

Ken Hume