Coarse Gravelly Fill in Late Roman Water Channel 2. Green Sand in Late Roman Water Channel 1. Cleaning Wall of Late Roman Water Channel 2. East of Great Drain; Layer 4; Red. Well at 69/ΜΘ ... ΝΝ-15 2875, 2876 ΝΝ:1947.0419:1 ΝΝ:1947.0419:2 ΝΝ:1947.0419:3 ΝΝ:1947.0421:1 ΝΝ:1947.0421:2 ΝΝ:1947.0421:3 ... 176-192 A.D ... ΝΝ ... ΝΝ:79-82/Κ-ΚΒ ... ΝΝ:79-82/ΙΘ-Κ