The diameter of the south tube was closer to 8' in diameter by my best recall. It narrowed to 6' at its southern length where the group stopped, observed absence of light, listened to the silence. The thing is, descending the stairs points directly into the southern segment. When the group returned from the northern segment, they should have passed "under" the stairway. But they passed directly onto the stairs.... Somehow, from the northern return, we got lost. and returned from the southern segment...as our last resort. It was quite frightening, later.
The diameter of the south tube was closer to 8' in diameter by my best recall. It narrowed to 6' at its southern length where the group stopped, observed absence of light, listened to the silence. The thing is, descending the stairs points directly into the southern segment. When the group returned from the northern segment, they should have passed "under" the stairway. But they passed directly onto the stairs.... Somehow, from the northern return, we got lost. and returned from the southern segment...as our last resort. It was quite frightening, later.