Ca. 73-81/Drain. Fillings associated with the construction of the Great Drain South, especially the fill thrown in behind the east wall of the drain at the time of its building. Cf. A 20-21:1 and B 19:7 ... Ca. 425-400 B.C ... ΝΝ ... ΝΝ:73-81/ΚΗ-Λ