Grace's Guide

British Industrial History

Grace's Guide is the leading source of historical information on industry and manufacturing in Britain. This web publication contains 138,086 pages of information and 222,958 images on early companies, their products and the people who designed and built them.

Llechwedd Slate Caverns

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Llechwedd, Blaenau, Ffestiniog, Gwynedd, LL41 3NB.

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