Have you found the Mineral Statistics, a government publication from about the 1850s? Before that period, the data that you want probably does not exist. Peter King 49, Stourbridge Road, Hagley, Stourbridge West Midlands DY9 0QS 01562-720368 [log in to unmask] -----Original Message----- From: mining-history [mailto:[log in to unmask]]On Behalf Of Jorge Ramirez Sent: 12 February 2007 11:00 To: [log in to unmask] Subject: River Wharfe mines Hello, I am a research assistant at the University of Hull and were working on a project which is part of the U.K. based EPSRC funded Flood Risk Management Research Consortium research programme. The project involves using a numerical model (TRACER) to simulate the historic and future passage and storage of contaminated sediment within the river Wharfe, UK. I am searching for information related to historical lead contamination amounts within the Wharfe catchment. I am specifically interested in yearly amounts produced by mills or mines, along with their geographical coordinates. Can anyone please tell me where I can find this type of data, thank you. Kind Regards, Jorge Ramirez