Merlin's Castle, Merlin's Furlong -- it's no wonder the three undergraduates off on a lark end up in the wrong place when they set out to retrieve the valuable diptych which old Professor Havers, a dabbler in witchcraft, believes was stolen from him by rival collector, the odious Mr. Aumbrey. When they eventually find the right place, they discover Aumbrey's dead body instead of the icon, and have a lot of explaining to do to the police. Meanwhile, Aumbrey had recently revised his will in favor of his impoverished poet nephew Richmond, making him a prime suspect in the murder, although his other three nephews insist no one knew of the change. It's a knotty problem indeed for Mrs. Bradley, and right up her alley, with her fondness for unruly students and all things macabre.
This book is part of the Mrs. Bradley Books series and is book #26 in the series.