Born in Derby, John Mawe (1766-1829) established a successful mineral-dealing business in London and became a significant figure in the development of British commercial mineralogy in the early nineteenth century. He travelled widely, advising on mineral exploration, and gathering specimens for clients such as Charles IV of Spain. This illustrated 1802 work gives an overview of the geological features and strata of Mawe's home county. He discusses the various mineral deposits to be found in Derbyshire, and describes some of the county's mines. Drawing on observations made on his travels, he gives descriptions of important mines in northern England, Scotland and Wales, alongside remarks on geological features of interest. The book closes with a glossary of terms used by miners in Derbyshire. Mawe's well-received Travels in the Interior of Brazil (revised edition, 1821) is also reissued in the Cambridge Library Collection.