The earliest description of carbon monoxide poisoning dates to at least 200 BC by Aristotle. Documented cases of carbon monoxide being used as a method of suicide date to at least 100 BC in ancient Rome. In the AD 350s, the Roman emperor Julian suffered from carbon monoxide poisoning in Paris, and later described it in his work "Misopogon": "though the winter weather prevailed and continually increased in severity, even so I did not allow my servants to heat the house, because I was afraid of drawing out the dampness in the walls; but I ordered them to carry in fire that had burned down and to place in the room a very moderate number of hot coals. But the coals, though there were not very many of them, brought out from the walls quantities of steam and this made me fall asleep. And since my head was filled with the fumes I was almost choked. Then I was carried outside." This misunderstanding of the causes of carbon monoxide poisoning may have caused the death of Julian's successor, Jovian.