The girl nodded without replying, her eyes on the advancing columns. The cavalry was the first to reach the bridge, and filed rapidly across to reënforce their comrades; then the infantry pressed forward in solid column. Stewart could see how the boats settled deep in the water under the tremendous weight. High above all other sounds, came the hideous shriek of a great shell, which flew over the bridge and exploded in the water a hundred yards below it. A minute later, there came another shriek, but this time the shell fell slightly short. But the third shell--the third shell! Surely, Stewart told himself, the bridge will be cleared; that close-packed column will not be exposed to a risk so awful. But it pressed on, without a pause, without a break. What must be the soldiers' thoughts, as they waited for the third shell! Again that high, hideous, blood-curdling shriek split through the air, and the next instant a shell exploded squarely in the middle of the bridge. Stewart had a moment's vision of a tangle of shattered bodies, then he saw that the bridge was gone and the river filled with drowning men, weighed down by their heavy accouterments. He could hear their shrill cries of terror as they struggled in the current; then the cries ceased as the river swept most of them away. Only a very few managed to reach the bank. Stewart hid his face in his trembling hands. It was too hideous! It could not be! He could not bear it--the world would not bear it, if it knew! A sharp cry from his companion told him that the awful drama was not yet played to an end. She was pointing beyond the river, where the cavalry and the small body of infantry which had got across seemed thrown into sudden confusion. Horses reared and fell, men dropped from their saddles. The infantry threw themselves forward upon their faces; and then to Stewart's ears came the sharp rattle of musketry. "The Belgians are attacking them!" cried the girl. "They are driving them back!" But that cavalry, so superbly trained, that infantry, so expertly officered, were not to be driven back without a struggle. The Uhlans formed into line and swept forward, with lances couched, over the ridge beyond the river and out of sight, in a furious charge. But the Belgians must have stood firm, for at the end of a few moments, the troopers straggled back again, sadly diminished in numbers, and rode rapidly away down the river, leaving the infantry to its fate. Meanwhile, on the eastern bank of the river, a battery of quick-firers had already been swung into position, and was singing its deadly tune to hold the Belgians back. Already the men of that little company on the farther side had found a sort of refuge behind a line of hummocks. Already some heavier guns were being hurried into position to defend the bridge which the engineers began at once to rebuild farther down the stream, where it would be better masked from the fort's attack.