Photo 1 - The excavated area on the left. On the right, in red the hypothetical wall to close the C shaped excavation (to make a cylinder/chimney). There is a ridge of rock (now covered with saplings) for the foundation of the wall.
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Photo 1 - The excavated area on the left. On the right, in red the hypothetical wall to close the C shaped excavation (to make a cylinder/chimney). There is a ridge of rock (now covered with saplings) for the foundation of the wall.