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Flannan Isles Lighthouse is a lighthouse near the highest point on Eilean Mòr, one of the Flannan Isles in the Outer Hebrides off the west coast of Scotland.

In 1900, its three keepers disappeared under mysterious circumstances.

The 23-metre (75 ft) lighthouse was designed by David Alan Stevenson for the Northern Lighthouse Board (NLB). Construction, between 1895 and 1899, was undertaken by George Lawson of Rutherglen at a cost of £1,899 (equivalent to £216,000 in 2025) inclusive of the building, landing places, stairs, and railway tracks. A further £3,526 (£401,000 in 2025) was spent on the shore station at Breasclete on the Isle of Lewis. The lighthouse was first lit on 7 December 1899. A cable-hauled railway was built to facilitate the transport of provisions up the steep gradients from the landing places. The cable was powered by a small steam engine in a shed adjoining the lighthouse. The rail line descended from the lighthouse in a westerly direction and then curved round to the south. In December 2025, Western Isles Council gave planning permission for the renovation and development of the shore station, which is a Grade B listed building. The first record that something was abnormal on the Flannan Isles was on 15 December 1900 when the steamer Archtor, on a passage from Philadelphia to Leith, noted in its log that the light was not operational in poor weather conditions. When the ship docked in Leith on 18 December 1900, the sighting was passed on to the Northern Lighthouse Board. The relief vessel, the lighthouse tender Hesperus, was unable to sail from Breasclete, Lewis, as planned on 20 December due to adverse weather; she did not reach the island until noon on 26 December. The lighthouse was manned by three men: James Ducat, Thomas Marshall and Donald McArthur, with a rotating fourth man spending time on shore. On arrival, the crew of Hesperus and the relief keeper found that the flagpole had no flag, none of the usual provision boxes had been left on the landing stage for restocking and none of the lighthouse keepers were there to welcome them ashore. Returning to the landing stage with this news, he then went back up to the lighthouse with Hesperus's second mate and a seaman. A set of oilskins was found, suggesting that one of the keepers had left the lighthouse without them. There was no sign of any of the keepers, neither inside the lighthouse nor anywhere on the island. Captain Harvie sent a telegram to the Northern Lighthouse Board dated 26 December 1900, stating: The three keepers, Ducat, Marshall and the Occasional have disappeared from the Island... They found that everything was intact at the east landing but the west landing provided considerable evidence of damage caused by recent storms.

On 29 December 1900 Robert Muirhead, a Northern Lighthouse Board (NLB) superintendent, arrived to conduct the official investigation into the incident. He examined the clothing left behind in the lighthouse and concluded that Ducat and Marshall had gone down to the western landing stage and that McArthur (the 'Occasional') had left the lighthouse during heavy rain in his shirt sleeves.

This was also puzzling, as all three men were experienced lighthouse keepers who knew they were in a secure structure 150 feet above sea level and should have known they were safe inside.

Wilfrid Wilson Gibson's (1878–1962) poem "Flannan Isle" recounts the horror of the search party who find an empty lighthouse with no trace of "three men dead". British rock group Genesis wrote and recorded "The Mystery of the Flannan Isle Lighthouse" in 1968. The Flannan Isles and the Lighthouse are featured in the 2021 Mark Dawson book Never Let Me Down Again. The video game Reverse: 1999 includes the Flannan Isles as a side story.

Quick Facts

• The 23-metre (75 ft) lighthouse was designed by David Alan Stevenson for the Northern Lighthouse Board (NLB).
• The Flannan Isles and the Lighthouse are featured in the 2021 Mark Dawson book Never Let Me Down Again.
• The lighthouse was first lit on 7 December 1899.
• The first record that something was abnormal on the Flannan Isles was on 15 December 1900 when the steamer Archtor, on a passage from Philadelphia to Leith, noted in its log that the light was not operational in poor weather conditions.
• He examined the clothing left behind in the lighthouse and concluded that Ducat and Marshall had gone down to the western landing stage and that McArthur (the 'Occasional') had left the lighthouse during heavy rain in his shirt sleeves.

Source material: Wikipedia - "Flannan Isles Lighthouse". Adapted and summarized for DiscoverScroll. Original contributors are credited through the linked Wikipedia article. Read original on Wikipedia. CC BY-SA 4.0. Changes were made from the original.