
A massive new safe‑deposit building rises on Lombard Street, its sleek façade and towering central vault promising absolute security. Behind the polished plans, the solicitor William Spedding boasts of an impenetrable design, while the city’s surveyor frets over the odd layout and the conspicuous empty hall at its heart. The project draws the attention of newspapers, contractors, and a curious observer who can’t help but wonder what secrets the steel‑lined pedestal might conceal.
When Spedding’s sudden death casts a shadow over the unfinished edifice, a series of puzzling clues—cryptic notes, a mysterious red envelope, and whispers of a hidden agenda—begin to surface. The sharp‑witted Angel, a master of deduction, is called upon to untangle the web of intrigue that surrounds the vault, the contractors, and the men who would profit from its mysteries. As the investigation unfolds, every brick and every whispered rumor could hold the key to a crime that threatens more than just the building’s reputation.
Language
en
Duration
~4 hours (279K characters)
Publisher of text edition
Project Gutenberg
Original publisher
New York: A. L. Burt Company, 1908, copyright 1927.
Credits
Emmanuel Ackerman, David E. Brown, 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
2023-12-04
Rights
Public domain in the USA.

1875–1932
A tireless storyteller who helped shape the modern thriller, he wrote fast-paced mysteries, adventure tales, and plays that captivated huge audiences in the early 20th century. His work mixed crime, suspense, and sharp journalistic energy, making him one of Britain’s most popular writers of his time.
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