Question: Which event in Edgar Allan Poe's life has remained mysterious, prior to which became engaged to Sarah Elmira Royster Shelton, and was soon found delirious in Baltimore and in need of assistance?
Sentence (from "Edgar Haynes"): Haynes also had a widespread criminal record of embezzling, fraud, and failure to pay debts, as well as a history of frequent disappearances, location changes, and turnover in employment in the United States and abroad.
Relevant evidence: No