Well, via the expedient of borrowing a camera, I now, once again, am capable of taking pictures. Unfortunately, despite it being a very good camera, I still don't seem to be capable of taking very good pictures. But this one, I hope, is at least illustrative.
As you might be able to see, we've taken down much of the northern half of the area in which I've been digging. Most of what you can see is a pile of plaster and rubble. It looks a bit like it might be a collapsed wall, or even fall from a ceiling, but it's hard to tell. Beyond that, there's a layer of reddish brown material, which seems to continue to go down. If all goes well tomorrow, we'll push into the stone feature, and get a good sense of what its foundation looks like. Then, we might take some pictures, and take the whole thing out. There also might be a pit that goes deeper than the feature that we have; that'll be a lot easier to see once we go further down as well.
And, perhaps sometime in the next few days, I'm thinking of taking the northern half of Garstang's wall down as far as it goes. That'll give us a cross section of what's coming, which is a useful thing to have. I would like to drop the area another foot or so before doing that, so we'll see what happens, and when it's likely to happen.