"The mining of lead in Derbyshire may have been practiced in pre-historic times. It was certainly practiced by the Romans. Several pigs (ingots) of lead found in the county are distinguished by the letters "LVT" or "LVTVD" and in one case "LVTVDARES", all of which are believed to refer to LUTUDARUM, a place in Derbyshire, not precisely located, but which a number of researchers advance good reasons for placing it in or very near to Chesterfield. Indeed, in 1835, the Rev R. Wallace, in a communication with the Derbyshire Courier, propounded that Lutudarum was the Roman name for Chesterfield. Not as the place in which the metal was originally procured, but as a depot or market to which it was brought for the purpose of sale or transmission to different parts of the country.