Early 20th century arsenic works at the Devon Great
· The main processing area of the arsenic works occupies two terraces on a south easterly slope the crushing calcining and refining structures are arranged along the lower terrace from which flues rise to a condenser on the upper terrace From the condenser a main flue extends over 250m to a chimney North west of the condenser a reservoir reused from the 19th century works fed water to