First lit on 12 November 1832, the Iron Pot was originally powered by sperm whale oil... Although officially renamed Derwent Lighthouse in 1884 the name Iron Pot has remained in use including on official documents... the light was manned until 1920. In 1997 the light was converted to solar power, the first in Australia... This comprehensive history of the Iron Pot is also a fascinating study of life in the colony and of its transition to the modern state of Tasmania."--Back cover.