Baffle in the drying kiln at Acorn Bank mill

I was interested in the practical aspect of the design of this grain drying floor. It needs to have a big surface area so as much grain as possible can be dried at once. However, the heat source is narrow - it's a coal fire underneath. They clearly found that a narrow source wouldn't spread out naturally so they installed a baffle to spread the heat. It wasn't still there so it wasn't possible to see how it had been made.