Frongoch was the largest of Cardiganshire's lead mines. This monograph tells the story of its development in the early 19th century and the eventual rise under John Taylor & Sons to a pre-eminent position as a part of the Lisburne group of mines. When the Taylors pulled out in the late 1870s, in the face of falling lead prices, the mine was able to survive for another 20 years by working the huge reserves of zinc blende which had been left untouched by the Taylors.