
A wave of inexplicable tragedies has swept through the upper echelons of society, leaving a trail of baffling deaths that whisper of hidden motives and silent conspiracies. While sipping tea, a well‑to‑do couple pores over the latest headlines, each story detailing the untimely demise of a baronet, a viscount, and several other prominent figures. The unsettling pattern hints at something far more sinister than mere coincidence, and the mystery begins to gnaw at anyone who dares to look beyond the polite façade of aristocratic life.
Henry Hartsilver, a self‑made businessman with a sharp tongue and a skeptical heart, watches the reports with detached curiosity. He recounts his humble origins and the reasons he chose a wife of noble standing, while his wife, Jessica, clings to the fear that these events might soon touch them. As the strange “knocker” echoes through their home, the couple finds themselves drawn into a tangled web of secrets, where every clue could either illuminate the truth or deepen the darkness.
Language
en
Duration
~7 hours (405K characters)
Publisher of text edition
Project Gutenberg
Original publisher
New York: The Macaulay Company, 1923.
Credits
Carol Brown, Tim Lindell and the Online Distributed Proofreading Team at https://www.pgdp.net (This book was produced from images made available by the HathiTrust Digital Library.)
Release date
2024-03-26
Rights
Public domain in the USA.

1864–1927
A hugely popular early master of spy fiction, he turned fears of invasion and international intrigue into fast-moving stories that gripped readers before the First World War. His books helped shape the mood of his age, mixing journalism, suspense, and a flair for dramatic danger.
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