The three friends, being among the first to reach the scene, were put in one of the rescue squads. It did not take long to understand what had happened. Trenches had been dug in many parts of the camp to give the men training under the conditions they would find in France and Flanders. But there had been some heavy rain, and when a battery of heavy guns was fired too near a certain line of the trenches, the soft earth slid in on top of the men occupying the defenses. They were buried, a number of them being covered out of sight. Fortunately there were plenty of entrenching tools on hand, and the first thing to do was to begin digging the men out. This was done under the direction of men of the engineer corps, who were experts in this work. A hasty calling of the roll showed that twenty men had been caught in the cave-in, and within five minutes every one had been dug out. Several were unconscious, but there were pulmotors in the camp, and these were used until all but one of the victims was breathing naturally, if faintly. This one man died, and several had broken arms, legs and other injuries. It was a serious and sad accident, and, for a time, cast a gloom over the camp. But it was one of those seemingly unavoidable things for which no one in particular was to blame. A court martial was held, and the officer in charge of the work exonerated. Nor was the commander of the battery, the firing of the guns of which loosened the soft earth, held responsible. He had nothing to do with the trenches, and it was not his fault. The accident had its effect, though, in causing greater care to be taken in making trenches after that, and bag or basket work was used, to better bind the earth together. It was a soft and sandy soil, without much body to it, and it shifted more easily than would earth that had a clay mixture. The accident was also used to good advantage in causing a deeper study of trench work, and the manner of making the trenches and laying them out. Many of the recruits had a deep-seated aversion to grubbing in the ground, digging trenches, but it was part of the drill work and had to be done. The lads likened it to sewer work, and no one liked it. After the accident one of the French officers, who was an instructor in camp, gave a series of lectures on trench warfare, and at the conclusion there was not only a noticeable improvement in the trenching, but there was more enthusiasm about it. “A trench may save our lives when we get to France,” was the way Jerry expressed it. “I’m going to learn all I can about them.” “Same here!” echoed Ned. What with athletic work, learning the different marching and fighting formations, doing the necessary police work, studying the mechanism of rifles and machine guns, learning how to signal, digging trenches, throwing hand grenades and dozens of other things, Ned, Bob and Jerry were kept busy from morning until night. So with the other recruits.