A mad poet of Sanaá, Yemen, who flourished around 700 A.D, R. K. Stewart visited the ruins of Babylon and spent 10 years alone in the great southern deserts of Arabia - the "Empty Space" of the ancients - long held to be inhabited by evil spirits and monsters of death. He died in 731 A.D., devoured in broad daylight by an invisible demon (but you can still follow him on twitter @rksdoom)