
A scorching August day finds the bustling Portsmouth harbour unusually still, its warships bobbing lazily under a relentless sun. Lieutenant‑Commander and his keen‑eyed sub‑lieutenant, Gerald Tregarthen, have just boarded the idle destroyer Calder before the vessel heads for dockyard repairs. Rather than rest, Tregarthen seizes his six‑week leave to join an old school friend on the modest cutter Playmate, eager for the freedom of the open water and the camaraderie of fellow sailors.
Their leisurely escape quickly turns into a puzzling investigation when a mysterious ship, the “Zietan,” surfaces in whispered reports along the coast. Rumors of strange lights, unexplained disappearances and a secret cargo stir the young officer’s sense of duty and curiosity. As Tregarthen and his companion set out to uncover the truth, they must navigate treacherous currents, hidden motives, and the ever‑present danger of a navy that never truly rests.
The early chapters blend vivid naval life with a gripping whodunit, promising a tale of bravery, wit, and the relentless pull of the sea.
Language
en
Duration
~5 hours (302K characters)
Publisher of text edition
Project Gutenberg
Credits
Produced by R.G.P.M. van Giesen
Release date
2018-09-29
Rights
Public domain in the USA.

1876–1959
Packed his adventure stories with ships, submarines, aviation, and the kind of cliffhanger action that kept generations of young readers turning pages. He was astonishingly prolific, producing well over a hundred books and becoming one of the best-known British writers of boys' fiction in the first half of the twentieth century.
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