The Jewel that was Ours is a detective novel featuring the highly intellectual and often morose Oxford detective, Chief Inspector Morse, and his loyal partner, Sergeant Lewis. The plot revolves around the theft of a priceless, antique jewel—The Great Mogul—during an American tourist visit to Oxford. The investigation is complicated by a seemingly unconnected murder, forcing Morse to navigate the sophisticated world of Oxford academics, wealthy American collectors, and local criminals. The book is a masterclass in misdirection and deduction, as Morse unravels a complex web of lies, past grudges, and deceit to uncover the shocking truth behind the theft.