Hi,
Yes you are right that the edge you saw was just the edge of the concrete slab. The concrete slab is being supported by the brick walls.
Above the slab is the wood beam in the center running across, see image called "Above Lintel" (I also note now that is not a lintel).
Thank you for your...
I am hoping someone can give me a little more knowledge on if this wall can be removed and be made flush in line with the door. Please see photos attached.