After cleaning the locus 3 stones, it's clear now that they are not floating but are resting on a clay floor (locus 7). The hearth feature (loc 6) is located between the two stones on the floor. After scraping down loc 6 hearth, finally got a decent charcoal sample for c14 (Ar/Ts.SS1.6.c14.1) at 93cm below datum. The hard gravelly locus 5 surface had very little material from it, so is more likely a geological substrate rather than a cultural level, though it is similar in texture to the floor in SLT8. Swept down and took photos of trench. Drew final plans of SS1 and SLT8 in the afternoon.