Today I split up the workers first thing, so 3 were in each half of the trench. In A, we began A2, just beneath the topsoil. Still wash. In B, I took the bottom elevations for B1 and began B2, because brown silt appeared in the SW corner. In the N and E part of the trench, the soil is still very dark - will try to trace it out. Rained out - continue tommorrow.