Demo-ing the plaster and lath:

Interesting- this was the location of a wall hung tank for a toilet! The white piece sticking out the top was to fill the tank which was mounted on the brown boards below it:

I’m pretty confident and competent with a crowbar these days:

Our air circ method involves a fan hung on two screws blowing air and dust OUT:

Finishing up that last bit of lintel:

Ug, dirty part of the work!