I enjoy your posts ,.David.. I googled Loggerheads,, actually I googled a few months ago when you first began posting as I have a lot of time on my hands and I am always interested and curious..My ancestors came from the South of England ( don`t be fooled by my ID Junkers 87,, I have had a couple of planes and love the old war birds,, especially the Stuka) I always thought that it was mostly coal in Wales and didn`t realize there was lead as well.. When I first left home I worked underground in a Lead ,zinc silver mine in the Yukon so I am interested in mining history as well.. My wife and I were in Scotland and Ireland a couple of years ago and I love the old buildings and hisory of the UK.. Cheers!! Robert James