Spent all day taking down loci 14, 15 and 16 in AC1. cleaned Locu 14 off of Locus 17 (the wall), which is in rough shape. it turned out locus 18, the burnt feature sitting within locus 15 in the center of the trench, is a heath feature made from upturned and opposed ashlars. sampled. at the end of the day approached the floor, uncovered some strange parallel dresssed stone features running out of the south baulk, parallel to the arch base (locus 19) and towards the north baulk (this is locus 20). finished detailed drawing of the collapse in AC2.