Queen Isabella was ripe for romance. She was a passionate woman in her late twenties, a striking beauty with plaited blonde hair. Furthermore, she had endured the loveless marriage with Edward since she was thirteen.

Roger de Mortimer, 8th Baron of Wigmore, was serving a life sentence in the Tower. His hair had grown long, his cheeks pale, and his eyes glowed with desperation. One glance at the handsome prisoner was enough to strike romantic interest in Isabella. It is not difficult to believe that the queen, her emotions stirred by the prisoner’s dark eyes, had made an opportunity to see him.

On the night of August 1 it was customary for the prison guards to celebrate the feast of St. Peter with food and drink. This time, the drink was drugged by the sub-lieutenant of the guards, Alspaye. When all the guards had fallen into a stupor, Mortimer dug…