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June 17, 2021 at 10:24 pm
#2017
Thomas, this is absolutely fascinating! Thank you for sharing the photos.
When I lived in New Orleans, I was trying to unearth an aluminum fence post in my back yard only to have it drop several feet into a hole. It was a brick lined “night soil” pit that was later bricked over with an arch. The soil was a good couple of feet higher. That the tunnel you saw represents several generations of use, repair, and amendments is easy to imagine.