Area of Trench U, from northwest. A = Early peribolos of tholos. B = Back wall of South Archaic House. C = Martyra along south side of trench. D = Stones set down in latest floor of South Archaic House ... AMS Horizontal (normal) ... Area of Trench U, from northwest. A = Early peribolos of tholos. B = Back wall of South Archaic House. C = Martyra along south side of trench. D = Stones set down in latest floor of South Archaic House.