From above we looked down on the bottom of the trench.

At the far end of the trench was a small opening.

Now the whole bottom of the trench was giving way.

They were not, after all, quite at the base of the trench.

I made no attempt to keep my head below the level of the trench.

There was just enough light for Paul to see the edge of the trench.

He could see the low line of trenches but for a short distance.

Then take your fork and break up the floor of the trench.

Fish found himself lying on the floor of the trench.

At the end of the trench were men who looked like their boots.