Reconstructing the midden pits

The big pits in the midden that Lisa and co. have been digging are really odd things. I've never seen features quite like them. They resemble the sort of pits dug to extract wall-installations and paintings, but on a huge scale. And they're dug, so it seems, to get at the mudbrick - the wall itself rather than anything on it. Why? Surely they have enough mud around to manufacture new mudbrick, and why quarry old mudbrick for fill if you're knocking down a building anyway and therefore have enough to do the infilling job out of what you've demolished. Unless there was something particularly special about the building that they were going down to, of course - won't know that until it's dug, and it won't be, so there's another mystery left tantalisingly hanging in mid-air.

I told Lisa a week ago that I would do a reconstruction of it, and I now have. I built a model of the pits based on the plan and then picked a point of view that showed them off best. Lisa seems happy with the image - the only alteration she suggested was a minor one: making sure you can see the walls being dug down to in the sections of the pits. That makes sense. I'll change the drawing this evening to make sure you can see that detail.