Original sentence: According to Michael Holroyd's book about Irving and Terry, "A Strange Eventful History": "Years later, when Irving was dead, Marguerite Steen asked Ellen whether she really had been Irving's lover, and she promptly answered: 'Of course I was
Edited sentence: According to Michael Holroyd's book about Irving and Terry, A Strange Eventful History: "Years later, when Irving was dead, Marguerite Steen asked Ellen whether she really had been Irving's lover, and she promptly answered: 'Of course I was