I saw Hanging Royd Mill on a map and wondered if it might be the same. However, the map showed it as being used for some kind of textile manufacture, whereas the document I came across mentioned a corn miller.
Maureen's find seems to suggest that it was indeed the same building: it was originally a corn mill, owned by the Cockcroft family (which is what my find said), but was later used for producing fustian. And Maureen's document also suggests some variation in the name of the mill.