| ΟΟ 293 | Line of North Wall Y; Poros Building Wall; North Wall Northeast Annex; On Grey Clay; Uneven Level Outside Level of Poros Building | 7-9 May 1949 | 5th B.C. | |
| ΟΟ 294 | Line of North Wall Y; Poros Building Wall; North Wall Northeast Annex; On Grey Clay; Clay Fill North and East of Wall Y, and on Wall Z | 11-12 May 1949 | | |
| ΟΟ 295 | Line of North Wall Y; Poros Building Wall; North Wall Northeast Annex; Clay Fill West of Wall Z | 12 May 1949 | First half of 5th B.C. | |
| ΟΟ 296 | Line of North Wall Y; Poros Building Wall; North Wall Northeast Annex; Footing Trench for Wall Y; Fill X | 11 May 1949 | 6th B.C. | |
| ΟΟ 297 | Line of North Wall Y; Poros Building Wall; North Wall Northeast Annex; On Firm Strosis West of Early Wall Z | | 6th B.C. | |
| ΟΟ 298 | East Wall of Poros Building; Central Area; Area F3; On Projecting Line of East Wall /.../ (Creating?) Fills X, Y, Z, and Z' | 3-7 Jun 1949 | 4th B.C. | |
| ΟΟ 299 | East Wall of Poros Building; Central Area; Area F3; On Marble Chip and Dust Floor; Fill A | 3-7 Jun 1949 | 4th B.C. | |
| ΟΟ 300 | East Wall of Poros Building; Central Area; Area F3; Footing Trench for Earlier South Wall of F3 | 6 Jun 1949 | 4th B.C. | |
| ΟΟ 301 | East Wall of Poros Building; Central Area; Area F3; Fill with Chips of Dust; Fill B | 3 Jun 1949-23 Jun 1950 | 5th B.C. | |
| ΟΟ 302 | East Wall of Poros Building; Central Area; Area F3; Same Fill in Trench of Marble Chips above Drain | 3 Jun 1949 | | |
| ΟΟ 303 | East Wall of Poros Building; Central Area; Area F3; Upper Layer of Chips at South of F3 | 3 Jun 1949 | 5th-4th B.C. | |
| ΟΟ 304 | East Wall of Poros Building; Central Area; Area F3; Fill C | 3-7 Jun 1949 | 2nd half of 5th B.C. | |