Minor point - rocks Ordovician not Silurian and more than twice that age (so what's in a few hundred million years?) I think it was not in the lead but on the hillside.... Best reference for more detail:
Potter, Terry F. (1999) The Welcome Stranger: a definitive account of the worlds largest alluvial gold nugget. ISBN 0-646-38709-X
(Terry is a local geologist)
Potter, Terry F. (1999) The Welcome Stranger: a definitive account of the worlds largest alluvial gold nugget. ISBN 0-646-38709-X
(Terry is a local geologist)