Today drew south section of NT01A. Also drew Walls B20, 21, and 24 on daily plans. They are roughly measured, but reasonably accurate. No longer working in either A or B -- ATS and RB think we are at the floor in A and RB says there is not enough room to take B17 down any further until the baulk comes out. So priority now is drawing sections so we can do that. Still working in C - still topsoil and wash. In the SW corner we are running into large stretches of bedrock. Ruben thinks we may want to stop digging in that half of the trench.