I did not get to find out, as the weather turned soggy the last two days. We ducked in and out of shelter, and our progress was much slowed. In particular we were not able to excavate a feature such as the above, as all low spots turned into sticky goo that does not trowel well, and in which artifacts are difficult to see.
Another digger up the street a bit resorted to unusual measures to attempt to influence the weather--he built a small altar out of a rectangular wall stone, decorated it with various colored pebbles and placed small offerings of rusty nails and bits of brick in front of it! To little apparent effect.
I look forward to returning next year, and as such have left a bit of my digging "kit" in the storage room of the Twice Brewed Inn. Mostly stuff spouse would regard as too shabby for wearing anywhere but a dig site.