Maybe a torch…
I went to the pile of chewed bones and rummaged among them until I found a promising piece: a straight shank, hollow, with only one end broken off but the marrow totally gone. I didn’t stop to wonder how the unsplit bone had come to be empty; it would be enough for me to avoid whatever had done that.
I poked strings of the pale lichen down the hollow of the bone, leaving an inch hanging out. Then I crawled laboriously to the edge of the liquid-gum pool and submerged the bone until it filled to the top. I managed to reach the end of the torch to the central fire, where the wick caught and burned well enough. The thick oil/wax/gum burned slowly, and I hoped it would last me to the next fire-pit.
Finally I tucked the torch upright into the lamp-catch of my helmet, set the he
