"The D'Arblay Mystery" is a conventional mystery novel written by R. Austin Freeman. The tale revolves round Dr. John Thorndyke, a forensic expert and detective. The plot unfolds as Thorndyke becomes entangled in a confusing case regarding the mysterious disappearance of a valuable French manuscript, the D'Arblay Jewel. The manuscript is well known with the aid of diverse events, and its disappearance sets off a chain of activities that lead Thorndyke...