For several minutes they walked silently through a low tunnel.

It was the entrance to a low arched tunnel some four feet high.

In the lower tunnel, midway, there should be one to the right.

Then they were entering the low tunnel that led to the outside cave.

They moved forward to crouch in a narrow, low tunnel.

Beyond that was a passage like a long, low tunnel.

The flashlight showed a low, dark tunnel into the hillside.

They could not claim victory over what had happened in the lower tunnels.

At the top of the shaft was another low tunnel.

"I have sent a handful of runners ahead to guard the lower tunnels."