It was dark when they came into the zone where the transport had its dead line. The length of their march was often in darkness if we were making concentrations for an attack. Some went to their appointed places as reserves in the warrens dug on reverse slopes; others in cautious files, led by guides from the troops in position who knew the ground, went on until they came to the little pits where the outposts were lying, or to machine-gun posts which faced the enemy under the whipping of bullets and the bursts of shell-fire and gas. They were the very point of the wedge which all the strength of our nation was driving. Wet to the skin, filthy, hollow-eyed, the occupants gave up their places to the newcomers, whose officers located their positions on the map, and received local information from their predecessors about the character and direction of fire and many details. It was like a change of shift in a factory--all as businesslike as possible. How different this front from the days of stationary warfare, with the deep trenches with parapets of sand-bags! Individualism here returned to its own. Patrols must be sent out to keep watch of the enemy; machine-guns and riflemen must be ready for a counter-attack,--which were variations from that deadly monotony of lying in a wet hole in the ground, whether on a bare crest or among the roots of trees in a wood. Blood-stains, torn bits of uniform, meat tins, and hard bread boxes formed the litter around the fox-holes, which marked the stages of progress where we had dug in. The young officers had to creep from fox-hole to fox-hole, keeping touch with their platoons, and bearing in mind all the instructions, regardless of exposure to cold and fire. The men must not forget anything they were told. Their gas masks must always be ready; they must "stick to the death" when that served the purpose of their superiors. Nothing except war's demands could have won them to such willing submission to such a hideous existence. If there were to be an attack the next morning, then stealthily the men of the first wave came up to the line of the fox-holes and hugged the clammy moist earth, while they were to keep their spirits hot for their charge. Their officers had to study the ground over which they were to advance; consider the speed of the barrage which they were to follow; carry out amazingly intricate maneuvers,--not knowing what volume of shell and machine-gun fire would meet them as they rose to the charge in the chilliest hour of the day, at dawn, when the ground reeked in slipperiness from the mist. The night before an attack always had the same oppressive suspense, the same urgency on the part of all hands in trying to be definite under the camouflage of darkness--hazard omnipotent in its grip on every man's thought.