Modern walls in middle ... AMS 231 Horizontal (normal) ... 26 Jun 1931
Water channel south of mouth of "Cave", from east ... AMS 241 Horizontal (normal) ... 27 Jun 1931
North end along rectangular rock wall ... AMS 249 Horizontal (normal) ... 29 Jun 1931
Northeast corner of "dig" ... AMS 249 Horizontal (normal) ... 29 Jun 1931
