Copies of engineers' reports, valuations, and accounts, 1856-1893, mainly by Samuel Dobson, Pontypridd, Thomas Evans and William Thomas, Aberdâr, and Morgan W. Davies, Swansea, relating to Clydach Vale, Dan-y-deri, Dinas, Foxhole, and Pwllmawr collieries, Glamorganshire, the Murton colliery, co. Durham, the Monkstone manganese mines, Devonshire, and the Aspeich copper mines, southern France. A printed prospectus, 1889, of shares in Richard Evans & Co. Ltd, Haydock Collieries, near St Helens, is pasted inside the back cover.