Death in Ecstasy
- "Hail Fellow" – either a play or a show – fictional
- Petronius – I don't usually include references to authors alone, but here is was clear it was the works (and the risqué contents) and not the author that was being referenced.
Non-fiction: (the titles should speak for themselves as to the contents)
- Abberley‘s Curiosities of Chemistry. Published by Gasock and Hauptmann, New York, 1865. Appears to be fictional.
- From Wotan to Hitler – seems to be fictional.
- Jnana Yoga – could be fictional, could be real.
- Spiritual Experiences of a Fakir – seems to be fictional.
- The Koran - religious text.
- The Meaning and the Message – probably fictional.
- The Soul of the Lotus Bud – seems to be fictional.
- Eros on Calvary and Other Poems, by Jasper Garnette (fictional).
- National Geographic
- The Daily Mail
- The Saturday Evening Post
- Ole Man Adam – probably Ol’ Man Adam an’ His Chillun by Roark Bradford. Collection of folk tales.
- The Daily Sun
- Double Knock – play. Appears to be fictional.
- Ladies of Leisure – play. Could be a reference to Ladies of the Evening by Milton Herbert Gropper, which was filmed in 1930 under the former title and might well have been performed under that title as a draw.
- Macbeth – play by Shakespeare. (Othello is also alluded to).
- Millament – play. Could be a reference to The Way of the World by William Congreve.
- Our Best Intentions – play. Appears to be fictional.
- Pagliacci – tragic opera by Ruggero Leoncavallo.
- Scissors to Grind – play. Appears to be fictional.
- The Jack Pot – play. Appears to be fictional.
- The Maid‘s Tragedy - play by Francis Beaumont and John Fletcher.
- The Mikado – comic opera by Gilbert and Sullivan.
- The Rat and the Beaver – play. Fictional (see Enter a Murderer).
- The Worst Woman in London – presumably the play by Walter Melville.
- Time Payment - play. Appears to be fictional.
Artists in Crime:
- The Palette – periodical for artists. There are several periodicals with that name, but it‘s a very generic name and I can‘t begin to guess if it‘s a fictional periodical or a real one.
- Trilby by George du Maurier. This could be a reference to a play based on the book, but I rather fancy it‘s the book that‘s being referenced.
- Angle of Incidence – play by Michael Sasha ("about three county council labourers in a sewer"). Fictional.
- Freud Without Tears – sounds like a „for Dummies“ book. Fictional.
- Les Très Riches Heures du Duc de Berry – a book of hours, manuscript illustrated by the Limbourg brothers.
- The Consolations of a Critic - by C. Lewis Hind, 1911.
- The Letters of D.H. Lawrence
- Principles and Practices of Criminal Investigation by Roderick Alleyn, M.A. (Oxon), C.I.D. (Sable & Murgatroyd, 21s.) – Fictional.