On September 27, 1849, Poe left Richmond after a short visit. It is unknown what happened to him until October 3, when he was discovered outside of Gunner's Hall by a man named Joseph W. Walker in Baltimore. He was taken to Washington College Hospital. While in the hospital he became delirious and started seeing hallucinations. He died on October 7, 1849, in the hospital. Though it is not known what was his cause of death, there are several possible theories, including congestion of the brain, alcoholism withdrawal, tuberculosis, and rabies.