Cambridge, Ma 1864 Greek Revival

We are considering lowering the basement floor to make the space officially livable, so we have a structural engineer coming this weekend to give us some advice on what needs to be done. So in preparation for this visit I needed to open up a section of the wall along the foundation, while doing this I found some things you never want to do while finishing a basement. Also found two layers of sheet rock with a layer of paneling between them (a little over kill), also a unsuccessful attempt to level the ceiling.