Elevation given from T20's N datum. This is the cleaning locus for T20 in 2008; it is 99 instead of 100 because I forgot that Ruben had found a bead, which is actually T20.100. The top and bottom elevations were both taken from the area that is a huge, flat area basically in the middle of the trench, but of course, since this trench was dug at a variety of levels, it is not indicative of the depth to which cleaning was done throughout the trench.