The mourning bells - Christine Trent

One of Victorian London's most respected undertakers, Violet Harper has
the new duty of accompanying coffins from various undertakers on the
London Necropolis Railway for respectful funerals and burials in Surrey.
But on her fateful first trip, the mournful silence of the train is
shattered by the shrill ringing of a coffin bell-a device that prevents a
person from being buried alive.

Inside the noisome coffin Violet
finds a man wide-eyed with fear, claiming he was falsely interred. When
a second coffin bell is rung on another trip Violet grows suspicious.
She voices her qualms to Inspector Hurst of Scotland Yard, only to
receive a puzzling reply that, after all, it is not a crime to rise from
the dead.

But Violet's instincts are whispering that all is not
well on the London Necropolis Railway's tracks.
Is this all merely the
result of clumsy undertaking, or is there something more sinister afoot?
Determined to get to the heart of the matter, Violet uncovers a
treacherous plot and villains who will stop at nothing to keep a lid on
her search for the truth