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, bright-red goop from a horizontal trench. Problem is that the buckets come straight out of the ground and are conveyed by vertical chain up to a pulley mechanism at the apex of the machine, where the buckets then flip upside-down before descending back to the trench below. But nothing falls out of the buckets when they flip, the buckets are not dripping red with muck, and there is no hopper to collect the contents of the buckets, anyway. So, this massive prop is not mechanically correct nor practically functional, and it simply doesn't do anything. It's just eye candy.