Hi Keyboard. I can see a Slead Hall on the old map I linked to, but neither of the others, though I know it can be deceptive when following the enumerator's route as places are often not as close as you would expect them to be.
I also know that some places called "Hall" are not always as grand as we might expect them to be, or the word Hall has a slightly different meaning.
I can't see any obvious industry on the map which may have employed these people.
I didn't look too carefully before, there are Quarries located south of Laverock Hall.
There is also the possibility of a name change for Laverock Hall I suppose.
Added: Quite a few mentions of Bottom Hall on the net and Gawbutt Hall gets a mention in Calderdale Companion.
