1917年在瑞典發表的幻之名作，水準很高，在偵探小說史上有重要地位（或許）。
簡介：When the author asks detective Leo Carring for a case to write about, instead of a story from the detective, he receives the diary of one Dr. Smirno, a forensic genius that assists Carring in solving a very curious case of a murder.
作者：Samuel August Duse (also Sam Duse and pseudonym Sam Sellén) was a Swedish soldier, writer, artist and multitasker. He was of the first generation of Swedish crime writers.
