In this fully illustrated book, the Rev. H. G. Nicholls, M.A., studies the historical evidence of the Iron Ore Mining in the Forest of Dean from the earliest times. The book contains these words in the introduction: In the year 1780, wrote Mr. Wyrrall, in his valuable MS. on the ancient iron works of the Forest:- "There are, deep in the earth, vast caverns scooped out by men's hands, and large as the aisles of churches; and on its surface are extensive labyrinths worked among the rocks, and now long since overgrown with woods, which whosoever traces them must see with astonishment, and incline to think them to have been the work of armies rather than of private labourers. They certainly were the toil of many centuries, and this perhaps before they thought of searching in the bowels of the earth for their ore-whither, however, they at length naturally pursued the veins, as they found them to be exhausted near the surface."