franco b wrote:Seems strange to have all that brick work if there were not a third flue.
I think its mainly for aesthetic purposes. If you look in the basement, the chimney is the same width as the exposed chimney on the roof. In between the roof and basement, in the first floor living room, that chimney is visible to the room and a fireplace is built into it. Fireplace is exactly in the center with room on both sides.
If I can find the architectural blueprints, perhaps that may show the presence of a third flue.