Casquets lighthouses per ton of ship when vessels passed the rocks and in turn he paid Trinity House 50 pounds per year for the right to run the lighthouses. The lighthouses reverted to Trinity House in 1785. They were converted to oil lamps with metal reflectors which were first used on 25 November 1790; and upgraded again with apparatus to rotate a beam of light in 1818. This had a clockwork mechanism which was wound up every hour and a half and gave one flash every 15 seconds. The lighthouses were badly damaged and the lanterns smashed in a severe storm on
Apostle Islands Lighthouses Duluth-Superior grew, and with the opening of Ashland's first ore dock in 1886. The Apostle Islands lighthouses are popular among tourists. Lighthouse historian Terry Pepper has described them as "one of the more interesting geographically centered collection of [lighthouse] structures" in the United States. Another lighthouse historian, F. Ross Holland, has called them "the largest and finest single collection of lighthouses in the country." The following lighthouses were included in the 1977 National Register listing: Other lighthouses are in the area, but are not included in the Apostle Islands Lighthouses listing: Major restoration projects were initiated at several of the