Suddenly a German bullet pierced the forehead of Captain Donaldson, and the brave officer threw up his hands and sank without a word. Instantly, realizing that there must be a single head to the party, Hal assumed command. "Faster, men!" he called. "We're almost there!" The troops exerted themselves to further efforts. Men sank every moment, hit by the enemy fire, but the others swam on apparently utterly oblivious to the danger that faced them. Notwithstanding their losses and the fact that the swimmers could not fight back, nor even defend themselves, the bulk of the first expedition reached the east bank of the river with lines that were drawn taut across the stream. Others floated on rafts and collapsible boats. These men had less success than the swimmers, for they were better targets for the enemy's fire, and the boats could be easily sunk by bullets even if the occupants were not hit. Close to where the swimmers had crossed, engineers, who had been drawn across, now began to throw over pontoon bridges and a tiny foot bridge. The pontoons crumbled under the German fire, but the foot bridge remained intact and added materially to the constantly increasing number of men on the east bank. Soon after dark the first brigade was across the first barrier and more men were ready to make the journey. After the swimmers headed by Hal and Chester had crossed the river, they waited eagerly until their comrades arrived with rifles, ammunition and side arms. Then they moved forward to the second phase of the perilous undertaking. This was the crossing of the kilometer of mud stretching between the river and the canal beyond, which, though it was under enemy fire, was not held by infantry. The Americans stumbled across the mud under a withering fire, firing as they advanced. From the rear the American lines were being constantly increased, so that now instead of the handful of men who had forced the crossing, there were enough American troops to offer a formidable fighting front. Their feet sank into the mud as they advanced and soon the pace of the men was slowed down to a laborious walk. But there was no hesitancy in the ranks--no faltering. The men were too anxious to come to close quarters with the foe for that. The German guns played terrible havoc with the Yankees, but the rest pushed through. Now came the third phase of the advance. This constituted the crossing of the canal, with its sheer sides and the Germans almost at the top of the eastern bank. Here again the party, led by Hal and Chester, threw aside their arms and plunged into the water. "Forward men!" cried Chester, as he plunged into the canal. The men took up the cry with cheers, and swam rapidly after him. Hal kept close to Chester's side. Soon they reached the opposite shore, where lines were again drawn taut and other men were pulled across on rafts and in boats. Once more the engineers got busy and almost as if by magic, bridges appeared.