In locus 20 of SLT5 took carbon sample at -116cm b.d. Also took a small sample from -1m b.d. on locus 21 floor in southwest corner of the operation. Third radiocarbon sample taken from lowest level of floor at eastern end of locus 21 at -154cm all of which will clarify periodization of this southern most room.
Finished cleaning SLT4 baulk and took photo but forgot to wipe down side walls so will have to take another if time permits.