He looked down at the great head, motionless on the tunnel floor.

The cat still sat in the middle of the tunnel floor, watching.

More people appeared as the tunnel floors finally began to level out.

This point he soon found in the lateral wall on the left side, about three feet above the level of the tunnel floor.

One of the prisoners is being on the tunnel floor.

One after the other, they dropped down the ladder to the tunnel floor.

Both sank to the tunnel floor, unconscious but not dead.

He was moving straight ahead, still staring at the tunnel floor.

I nearly lost my balance, lowering myself to the tunnel floor.

Out cold, he fell face forward on the tunnel floor.