- John Mordaunt, a.k.a. Mr. Dicks, the master criminal
- Beatrice Fuller, moll
- Edward Tapley, the tall man
- Joe Flipp, the dwarf
- Jack Baxter, a.k.a. A. P. Smith
- Arthur Lancing, a.k.a. George Finch, a.k.a. Alf Smith
- Geoffrey Mordaunt, John's brother, of Scotland Yard
- Joan Heather, Geoffrey's fiancée
- James Cardhew, owner of the ruby
- Wilfred Hobson, of Scotland Yard; a.k.a. Mr. Killick
...added to these things was the strange atmosphere of the hosue itself, its haunting setting, and utter loneliness. Amid this wilderness of trees there should have been peace; and peace, in one sense, there was; but it was a brooding, malignant peace, throbbing with subconscious discord.
...he glanced out of the window. The velvet shadoes of the spires had by now licked their way right across the lawn below, and were pointing, like black arrows, into the bushes.
I enjoyed the part where Mordaunt escapes across a lake in a leaky boat, and walks through the dark forest in search of a woodcutter's hut for a shelter; bribing the woodcutter to not reveal his presence.
A cringeworthy part was a restaurant scene where no one wants to share a table with a Black man.
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