Using the hammer drill with the chisel bit we’ve managed to excavate down to the footings of the north wall. It appears that the footings are solid and well-formed. Hopefully that’s the case right the way around. Amazing to work through the most recent ‘cement pour’ to discover two earlier examples of cement floors. When all the cement is removed there should be plenty of space for air to flow underneath the building – and help manage any moisture around the site.