Modern walls in central section ... AMS 197 Horizontal (normal) ... 23 Jun 1931
Modern walls in central area ... AMS 197 Horizontal (normal) ... 23 Jun 1931
Modern walls in central section ... AMS 198 Horizontal (normal) ... 23 Jun 1931
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