Gabled roof

Immediate inside the little house at the S entrance a short flight of stapes leads down into a walled stretch about 15 m long. Although Fabricius drew this section straight in his diagram, it is in fact curved slightly. The sides are built of large blocks joined without mortar, and the huge blocks leaning against each other at an angle form a gabled roof. This wall was almost certainly erected by the original builders of the tunnel. At the inner end of the passage there was once a door, as can be seen from a notch for the hinge chiseled into the corner of the wall at the right side; the other side has a cavity for a bolt. Just in front of this doorway a large shaft rises to the surface, providing light that can be seen nearly 450 m within the tunnel (Goodfield1964)