We were in a sort of cavern with no lack of air. On the contrary, we could feel a draft. What was causing this?
From JRR Tolkien's "The Lord of the Rings":
They seemed to have passed through some arched doorway into a black and empty space. There was a great draught of warmer air behind them, and before them the darkness was cold on their faces....The Company spent that night in the great cavernous hall, huddled close together in a corner to escape the draught: there seemed to be a steady inflow of chill air through the eastern archway.
