St Agnes Lighthouse

St Agnes lighthouse is a 17th-century lighthouse situated on St Agnes on the Isles of Scilly. It was the second to be built in the western approaches (after the Lizard lighthouse of 1619); it was also only the second lighthouse station to be established by Trinity House (after Lowestoft in 1609). In 1680 Trinity House began a survey of the coasts of England as it was known that the contemporary charts were inaccurate; the Isles of Scilly was plotted ten miles to the north. On 24 May that year, Trinity House was given permission to erect and maintain one or more lighthouses on the islands. St Agnes was chosen as it is the most westerly of the habitable islands and close to the collection of rocks, tidal flows and currents, now known as the Western Rocks. The lighthouse was built in 1680 and stands 74' above the ground, and 138' above mean high water; the incorporation of gun ports in the structure of the tower is an unusual feature. A plaque records the original construction by Captains Hugh Hill and Simon Bayly (builders of the 1676 Lowestoft lighthouse). There were two protests against the building of the St Agnes light: officials from the Isle of Wight complained that they would lose revenue from harbour dues and victualling as shipping would prefer to use the Isles of Scilly, and the Governor of Scilly objected on the grounds that he would lose money from wrecks. Earlier petitions to build a lighthouse on St Agnes (submitted by private individuals and companies in 1665 and 1679) had been refused. The light was first lit on 30 October 1680; it was provided by coal burned within a brazier atop the tower. By 1756 the brazier was set within a lantern structure made up of 16 sash windows, roofed, with multiple chimneys. The lighthouse was coal fired until 1790, when it was converted to oil: twenty-one Argand lamps with reflectors, mounted on a three-sided revolving array. This 'very novel and ingenious operation' represented an innovation in optic design which was…