Factual error: Late in the film, we see both close-ups and wide shots of Sir Thomas Sharpe's "infernal machine" (a preposterously fictional clay-mining device) that is scooping bucket-after-bucket of oozing reddish goop. Problem is that the buckets are scooping vertically, straight out of the ground, and are conveyed by chain up to a pulley mechanism at the apex of the machine, where the buckets flip upside-down before descending. But nothing falls out of the buckets when they flip, and there is no hopper to collect the contents of the buckets, anyway. This massive prop is not mechanically correct nor practically functional. It's simply eye candy.