Trenches ran parallel, and other trenches cut across them.

One could wander through them for miles.

Most of them were uncovered, but others had roofs, partial or complete, of thatch or boards or canvas.

Many had little alcoves and shelves, dug out by the patient hands of the soldiers, and these niches contained their most precious belongings.
Back of the trenches often lay great heaps of refuse like the kitchen middens of primeval man.

Attempts at coziness had achieved a little success in some places, but nearly everywhere the abode of burrowing soldiers was raw, rank and fetid.