Mycenaean Tomb at 69-71/Ν-ΝΒ just after it was cleaned up in preparation for being filled and outlined with a small wall. The fill is of small stones and so insures drainage of water through the tomb area ... AMS Horizontal (normal)
Preservation of Great Drain ... AMS Horizontal (normal)
Great Drain ... AMS 2356 Horizontal (normal) ... 13 Jun 1939