There are three openings between the hall and kitchen. Two at ground level (an internal window and a doorway) and one upstairs (a sort of Juliette balcony from Jo’s study).
We have cut the two ground floor openings. We have cut the openings using a Stihl saw and then have pulled out the masonry (but not before installing a lintel above the opening!). Using a Stihl saw is a little gentler on the wall that bashing it with big hammers and chisels.
You can start to see the jumble of stones that make up the inside of the wall. It is a fairly fragile structure and needs to be shown a certain level of respect.