‘Hot Steel’ by Anthony Berkeley reprinted by permission of The Society of Authors as the Literary Representative of the Estate of Anthony Berkeley Cox.
‘The Murder at Warbeck Hall’ by Cyril Hare reprinted by permission of United Agents LLP on behalf of Sophia Jane Holroyd.
‘The House of the Poplars’ by Dorothy L. Sayers copyright © 2020 The Trustees of Anthony Fleming (deceased).
‘The Hampstead Murder’ by Christopher Bush copyright © Christopher Bush 1955, reprinted by permission of Giles Dalton.
‘The Scarecrow Murders’ by Joseph Commings copyright © the Catholic Diocese of St Petersburg, Florida, 1948.
‘The Incident of the Dog’s Ball’ by Agatha Christie copyright © Christie Archive Trust 2009. All rights reserved. Agatha Christie and Poirot are registered trade marks of Agatha Christie Limited in the UK and elsewhere.
‘The Riddle of the Black Spade’ by Stuart Palmer reprinted by permission of the author’s estate and the agents for the estate, JABberwocky Literary Agency, Inc., 49 W 45th St Ste. 12N, New York, NY 10036.
‘The Torch at the Window’ by Josephine Bell copyright © the estate of Josephine Bell, reprinted with permission of Curtis Brown Group Ltd, London.
‘Grand Guignol’ by John Dickson Carr copyright © John Dickson Carr 1929.
‘A Knotty Problem’ by Ngaio Marsh copyright © Estate of Ngaio Marsh 2020.
‘The Orange Kid’ by Peter Cheyney copyright © Peter Cheyney 1938.
‘Mr Prendergast and the Orange’ by Nicholas Blake reprinted by permission of Peters Fraser & Dunlop (www.petersfraserdunlop.com) on behalf of the Estate of Nicholas Blake.
‘The Yellow Sphere’ by John Rhode copyright © Estate of John Rhode 1938.
‘The “Eat More Fruit” Murder’ by William A. R. Collins reprinted by permission of HarperCollins Publishers Ltd.
Every effort has been made to trace all owners of copyright. The editor and publishers apologise for any errors or omissions and would be grateful if notified of any corrections.