Shouldn't see daylight here...

Whilst digging out the last bit of the old floor a couple of days ago, we discovered the entire corner of the building was held up by an old culvert which was cut off level with the outside walls. Richard made a hole in it, and the next day filled it with a ton of concrete which he is confident will stop that corner of the house from falling down. Just outside was a drain into which the bath emptied. Or, as it turned out, didn't empty, as the drain was smashed below ground, so all the bathwater was simply soaking away under the corner of the house and creating a large void under the culvert. No wonder that corner was so damp, although if it was just me, it would have been fine as I don't take many baths.