Amazon.com description: Product Description: "[...] IRON SMELTING BY PIT-COAL—DUD DUDLEY. Greatly reduced production of English iron Proposal to use pit-coal instead of charcoal of wood in smelting Sturtevant's patent Rovenson's Dud Dudley; his family his history Uses pit-coal to smelt iron with success Takes out his patent The quality of the iron proved by tests Dudley's works swept away by a flood Rebuilds his works, and they are destroyed by a mob Renewal of his patent Outbreak of the Civil War Dudley joins the Royalists, and rises to be General of artillery His perilous adventures and hair-breadth escapes[...]".