Title: Motive v. Opportunity

Published in: The Royal Magazine

Year of publication: 1928        Publication month: April

Issue: Vol. 59, No. 354

Printed by: ?

Original book publication: The Thirteen Problems 1932 (British edition)
Published in the US the following year under the title The Tuesday Club Murders.

First publication in Sweden: Onkel Simons testamente 1928 (Stockholms-Tidningen on April 22)

Illustrator: Gilbert Wilkinson.

Price: ?

Number of instalments: One instalment.