On the NLW site; Walter Davies ('Gwallter Mechain') and The Board of Agriculture's printed surveys of 1810 and 1815
- General view of the agriculture and domestic economy of south Wales; containing the counties of Brecon, Caermarthen, Cardigan, Glamorgan, Pembroke, Radnor, Vol. I & Vol. II
- General view of the agriculture and domestic economy of north Wales; containing the counties of Anglesey, Caernarvon, Denbigh, Flint, Meirionydd, Montgomery
Here is the Wales section from Outline Map of the Mining Districts of the UK from the Childrens' Employment Commission Report of 1842. The shaded areas denote the Coal and Iron Mining Districts.
Copied from the CD published by Archive CD Books
Women and the pits - Leah Ryan's site
Victorian Professional Photographers in Wales 1850-1925 - a county based database compiled by Mari Alderman, includes sources and a bibliography
The British Book Trade Index is an index of the names and brief biographical details and trade details of people who worked in the book trade in England and Wales and who were trading by 1851
LIST OF MINES in Great Britain and the Isle of Man, 1908 Shows owners, managers, numbers employed above and below ground
Bibliography of Mining Publications on Welsh Mines and Welsh Mines Society
The Welsh Slate Museum
Slatesite ..... shows the Wales slate industry and the society from which it grew. Linked particularly to Gwynedd County Council Archive and Museums Services and the Welsh Slate Museum, which are both supporting partners, it aims to be the main source of interpretive and teaching materials for lifelong learning about the industry, culture and social context of the North Wales slate areas.