Middle of 5th B.C ... Line of North Wall Y; Poros Building Wall; North Wall Northeast Annex; Fill to North of Line of Wall Y with Limestone Working Chips
First half of 5th B.C ... Line of North Wall Y; Poros Building Wall; North Wall Northeast Annex; Clay Fill West of Wall Z
Middle of 5th B.C ... Line of North Wall Y; Poros Building Wall; North Wall Northeast Annex; On Edge of Trench for Wall