That side of History is appeals to me.
I've always wondered about Greek Fire and other flammables from history.
There were reports of 'eternal flame' lamps that had a unique oil or something in them that burned for a long time without need for replensishing the oil for awhile.
Supposedly smelled sweet as well or some such if memory serves, probably doesn't.
But.. nobody knows what the stuff was, and volatiles tend to evaporate away over the centuries.