Poros Block Cut through by Well Diggers. Cover Slab. Broken Bedrock Fill. Great Drain. Rough Stones and Earth. Greenish Clayey Fill; Lighter Below. Disturbed by Well Diggers. Approximate Level of Bedrock ... Ζ-5 921, 922 Ζ:1933.0529:1 N 19073 ... 31 May 1933 ... Ζ-5-75 (pp. 921-922) ... Ζ-5-75 ... Ζ.921