The Flannan Isles are a group of rocky, uninhabited islands in Scotland. They are named for St. Flannan, but are also known as the Seven Hunters. One of the largest of these seven islands is a rocky cliff-edged island known as Eilean Mor. Eilean Mor has a grassy hilltop at its apex. Perched atop this grassy hill is a lighthouse that is known as the Flannan Isles lighthouse. The Flannan Isles lighthouse was the scene of three mysterious disappearances roughly one year after it was built. Three men vanished from the lighthouse without a trace. There was no sign of a disturbance and very few clues to the nature of their fate. The scene was reminiscent of that aboard the Mary Celeste when her crew and passengers famously disappeared roughly thirty years before.
On December 7, 1900, Donald MacArthur, Thomas Marshall and James Ducat arrived at the Flannan Isles lighthouse to begin their two-week rotation as keepers of the lighthouse. The Superintendent of Lighthouses, Robert Muirhead came with them to do a routine check of the lighthouse and speak to the men. He made certain that everything was in working order and then spoke with James Ducat about some difficulties they were having with the heavy mist that commonly surrounded the island. The men then said goodbye to the Superintendent and he left.
The lighthouse was regularly monitored from the mainland by telescope. This way, if there were an emergency, the men could signal for help. Unfortunately, there was the problem with the mist. The lighthouse was seen on December 7 and December 12. The lighthouse was also seen on December 15, by a passing ship. The crew noted that the light was not shining, as it should have been. It was not seen from land again until December 29, well after the men should have ended their rotation.
The ship that was to deliver the men’s relief and bring them home from the Flannan Isles lighthouse was delayed until December 21, because of a run of bad weather. When the ship, the SS Hesperus, arrived at Eilean Mor, the men on board expected to see a flag flying to indicate that the keepers had noted their arrival and would be deploying a rowboat to retrieve their relief. However, the flag was not flying, nor did the men respond to a siren. A landing craft with two men on board was launched from the SS Hesperus with two men on board.
When the two men reached Eilean Mor, one man, Joseph Moore, went up to check the lighthouse for the three missing men. He found the entrance locked. He unlocked the door and entered to find the Flannan Isles lighthouse unmanned. The clock on the wall had stopped, no fire was in the grate (nor had one been there for a few days), there was a meal sitting at the table. It looked like someone had set it down with the intention of eating it soon, but it was untouched. Whatever had happened to the men, it had happened to them suddenly. There was nothing anyone could do about it with so few clues, so four men, including Moore, were left on the island to operate the lighthouse and everyone else left.
The records of the three Flannan Isles Lighthouse Keepers were subsequently inspected. It was discovered that Eilean Mor was hit with a strong storm on December 14. The last entry was made in the afternoon of December 15. Superintendent Muirhead concluded that the men must have been taken by nature when they left the lighthouse to repair some damage that was done to a storage container outside during the storm. One of his theories (the most likely) was that a large wave came up on the men while they were working and swept all three of them into the Atlantic Ocean, where they died.
Muirhead’s theory is largely regarded as truth. The only other alternatives seem to be that the men left of their own accord, they were kidnapped, aliens intervened or they were sucked into another dimension, all of which seem ludicrous. Unfortunately, none of their bodies was ever recovered, so there is no way to be sure.