The Adventure of the Golden Pince-Nez

"The Adventure of the Golden Pince-Nez", one of the 56 Sherlock Holmes short stories written by Sir Arthur Conan Doyle, is one of 13 stories in the cycle collected as The Return of Sherlock Holmes.
One wretched November night, Inspector Stanley Hopkins visits Holmes at 221B Baker Street to discuss the violent death of Willoughby Smith, secretary to aged invalid Professor Coram. Coram had dismissed his previous two secretaries. The murder happened at Yoxley Old Place near Chatham, Kent, with a sealing-wax knife of the professor's as the weapon. Hopkins can identify no motive for the killing, with Smith having no enemies or trouble in his past. Smith was found by Coram's maid, who recounts his last words as "The professor; it was she."
The maid further told Hopkins that prior to the murder she heard Smith leave his room and walk down to the study; she had been hanging curtains and did not see him, only recognizing his brisk step. The professor was in bed at the time. A minute later, a hoarse scream issued from the study, and the maid, hesitating briefly, inspected and found the murder. She later tells Holmes that Smith went out for a walk not long before the murder...
Famous works of the author Arthur Conan Doyle: A Study in Scarlet, The Sign of the Four, The Adventures of Sherlock Holmes, The Memoirs of Sherlock Holmes, The Hound of the Baskervilles, The Return of Sherlock Holmes, The Valley of Fear, His Last Bow, The Case-Book of Sherlock Holmes, Stories of Sherlock Holmes, The Lost World.