Began working in B26, which should be 30 or 40 cm above the floor outside of Wall B20 (if the floor in A is anything to judge by). It is going very slow because of the screening, and it is very windy so there is a lot of grumbling and shuffling of feet. Finished about a third of it today. RB had some workers remove some of the B/C baulk for the architect -- mostly took out topsoil today. In C I did some drawing b/c Iam very confused about what is going on here -- wanted to draw some rocks so I could reconstruct if I took them out and they turned out to be something. PA and ATS came by and removed some rocks right after I finsihed drawing, and they had a look at the orange deposit that is C7. PA says it is not floor b/c it is too soft, but it might be melted building material or some such thing. Continued tracing out boundaries of C7 and began taking some of it out.