---
title: The Flannan Isles Mystery
description: "In December 1900, three experienced lighthouse keepers vanished without trace from the remote Flannan Isles. Explore the enduring mystery, the theories, and what likely happened to James Ducat, Thomas Marshall, and Donald McArthur."
url: https://decodingtheunknown.pub/article/the-flannan-isles-mystery.md
canonical: https://decodingtheunknown.pub/article/the-flannan-isles-mystery
datePublished: 2026-06-28
dateModified: 2026-06-28
author:
  - name: Simon Whistler
    url: https://decodingtheunknown.pub/author/simon-whistler
publisher: Decoding the Unknown
image: "https://media.decodingtheunknown.pub/cdn-cgi/image/width=1600,height=900,fit=cover,quality=80,format=auto/articles/2OkFN0Kw9YE/hero.jpg"
type: Article
contentHash: ce5fd19193aad720aa303680afb8b62ea8104a8f5411c35159b4cb1f6b2ec071
tokens: 58
summaryUrl: https://decodingtheunknown.pub/article/the-flannan-isles-mystery.md.summary.md
---

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In December 1900, three experienced lighthouse keepers vanished without trace from the remote Flannan Isles. Explore the enduring mystery, the theories, and what likely happened to James Ducat, Thomas Marshall, and Donald McArthur.
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