Fergus Hume 
The Third Volume 

'The Third Volume’ by Fergus Hume is a thrilling mystery novel that follows the investigation of a murder in a secluded mansion. The story revolves around the discovery of a locked room and the suspicious behavior of the inhabitants of the house. The detective, Mr. Reginald Brett, must unravel the complex web of secrets and motives that lead to the shocking truth behind the crime. With its intricate plot and unexpected twists, 'The Third Volume’ is a classic page-turner that will keep readers guessing until the very end.