 A substantial cement works was built at Darlington in the early 1920s, with a 2 ft gauge tramway linking the quarries to the cement works and a new jetty.At the height of its fortunes in the early 20th century, Darlington had hundreds of residents and several hotels.By July 1930, all of those ventures had failed for a number of reasons, including the Great Depression, poor quality limestone, and competition from mainland producers who were not burdened with high costs of transport.