I don't understand why they would do this?
The liner in combination with the smoke-hole work very well without all this need-less work. All one needs to do is adjust the smoke-flaps.
As I said: “
I had read”
that the Natives living in Teepee would dig a fire pit in the center of there Teepee. Then dig a trench several feet beon the wall of there Teepee, then they would lay sticks tightly side by side. Then cover the stick trench with dirt making a sort of chimney to draw the smoke out side of the Teepee.
I have not seen this put into effect, but have read about it.
I have, spent time in a few Teepee's and I have seen that there is always a backlash of smoke in the Teepee. No matter how much flap adjusting was done.
I have even seen, in a Teepee a small wood burning stove in the center with the stove pipe run almost to the Smoke-flaps.
As for me: If I had a Teepee, I would
TRY what I said above to help draw the smoke out.