Herewith the clues!
1982, First Mayflower Edition. New York : Mayflower Books Inc. Very good paperback copy in a dust-wrapper, now slightly edgeworn and dust-dulled. Text edges lightly foxed. On some of the leaves are mounted specimens purporting to be clues in the case. Remains well-preserved overall; internally clean and strong. Case solution pocket remains sealed. Item #471408
ISBN: 0831744472
Physical description; 1 volume (various pagings) : illustrations, facsimiles, plan, portraits ; 27 cm. Notes; Cover title. Reprint; originally published: London : Hutchinson, 1939. Subjects; Detective and mystery stories. 20th century. Crime dossiers. Illustrated. Facsimiles. Plan. Portraits. Clues (mounted specimens). Interactive fiction.
Price: €28.95