Clearing Middle Drain to North of Building C ... Ζ-14 2568, 2569 Ζ 1748 IL 1122 Ζ 1749 IL 1123 Ζ:1938.0526:6 N 19646 Ζ:1938.0526:7 N 19647 Ζ:1938.0526:8 N 19648 Ζ:1938.0526:9 N 19649 Ζ:1938.0526:10 Ζ:1938.0526:11 N 19650 Ζ:1938.0526:12 Ζ:1938.0526:13 ... 27 May 1938