Well, that seems to prove the theory pretty well. I need to search YouTube whenever an idea arises.
I would guess that with a green stump, there would be occasional steam explosions. After the chimney burns to an ideal size, it might be possible to line it with fire clay in order to prevent it from burning out. I suppose I should YouTube that idea before carrying it any further.
I doubt that I will ever run out of stumps, but in some cases you may want to preserve it for future use.