Alexander

As he traversed all Babylonia, which at once submitted to him, he was most of all amazed at the chasm from which fire continually streamed forth as from a spring, and at the stream of naphtha, so abundant as to form a lake, not far from the chasm. This naphtha is in other ways like asphaltum, but is so sensitive to fire that, before the flame touches it, it is kindled by the very radiance about the flame and often sets fire also to the intervening air.

To show its nature and power, the Barbarians sprinkled the street leading to Alexander’s quarters with small quantities of the liquid; then, standing at the farther end of the street, they applied their torches to the moistened spots; for it was now getting dark. The first spots at once caught fire, and without an appreciable interval of time, but with the speed of thought, the flame darted to the other end, and the street was one continuous fire.