When I was about halfway through my Henhouse Series, a friend said I had to visit Cosima. Her henhouse was a Taj Mahal of henhouses she said. Look here and you can see the center posts that is key in holding up the green roof. When I finally visited Cosima I had to agree. Her henhouse is a work of art. She said they built this cordwood  masonry henhouse using Robert L. Roy's books and that this is actually…