The plot is based on the 1880 disappearance of the geologist Lamont Young near Mystery Bay, New South Wales.
In 1880, a geologist, Lamont Young, and four others disappeared while on a boat trip from Bermagui.
A 1910 article, "Bermagui - In a Strange Sunset", by Henry Lawson published in The Bulletin, describes a steamer journey from Bermagui to Sydney.
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The plot of Arthur Upfield's detective novel, The Mystery of Swordfish Reef, is based on Young's disappearance.
The boat had carried Lamont Young, a government geologist inspecting new goldfields on behalf the New South Wales Mines Department together with his assistant Max Schneider, and boat owner Thomas Towers and two others, from nearby Bermagui.
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10 October - Geologist Lamont Young and four others disappear on a boat trip north from Bermagui, New South Wales.