This dramatic photo also appears (in reverse) as a square lantern slide (WRECKS 32OF 270) missing the figure on the left. The detail is, however much better.
Interior view of Bosalva Mill at Lamorna. Part of the ancient Manor of Kemyel, it has been and still is occupied by the Hosking families since the 14th century. (Angove, 1970)
On reverse it says , 'Interior view of the excel and large cog wheel in the cog pit of a typical 19 century mill. Picture taken before restoration, this gear train has now been restored' - No info on where.