Index. Refuse Dump of Tholos. Trench E below Layer III. Trench F. Poros Drain of Tholos. Terracotta Drain of Tholos. Poros Drain to Southeast of Tholos. Tholos Trench L ... Ζ-11 2154, 2155 A 755 A 836 A 783 A 1592 XII-56 ... Feb 15 1938 ... Poros Drain of Tholos ... Terracotta Drain of Tholos ... Poros Drain to Southeast of Tholos