Tunnel and pipe ... AMS 1149 Horizontal (normal) ... 16 Jun 1938
Pipe from inside tunnel ... AMS 1149 Horizontal (normal) ... 16 Jun 1938
Pipe-end, after removing a section from tunnel ... AMS 1148 Horizontal (normal) ... 16 Jun 1938
In tunnel, looking south. Back of south wall of poros drain ... AMS 1148 Horizontal (normal) ... 16 Jun 1938
