Here naphtha also is produced, a glutinous substance which looks like pitch. This too is similar to bitumen, and even a little bird, if it lights upon it, is prevented from flying, sinks, and disappears utterly. And when fluid of this kind catches fire, the mind of man will find no means of putting it out, except dust.
Of course, they could think of no use for it. It was the stuff of Hades, not opportunity.