They followed a deepening gulley that grew into a good-sized ravine. When they turned an angle of the ravine Brion saw a weak yellow light coming from an opening in the hard dirt wall. Ulv dropped on all fours and vanished through the shoulder-wide hole. Brion followed him, trying to ignore the growing tension and unease he felt. Crawling like this, head down, he was terribly vulnerable.

The trenches were narrow and very deep, neatly paved throughout their length with brick, spaced at regular intervals with sunk traps for draining off rain-water, and with bays and niches cut deep in the side to permit the passing of any one meeting a line of pack-burdened men in the shoulder-wide alley-way.