"Whatever it is, it will come soon," whispered Warner to Dick.

The gray thread broadened and became a ribbon of silver. The silver, as it widened, was shot through with pink and red and yellow, the colors of the morning. Dick caught a glimpse of massed bayonets near him, and of the Southern trenches rising slowly out of the dusk not far away. Then the earth rocked.

He felt a sudden violent and convulsive movement that nearly threw him from his feet, and the whole world in front of him blazed with fire, as if a volcano, after a long silence, had burst suddenly into furious activity. Black objects, the bodies of men, were borne upon the mass of shooting flames, and the roar was so tremendous that it was heard thirty miles away.

Dick had been expecting something, but no such red dawn as this, and when the fires suddenly sank, and the world-shaking crash turned to echoes he stood for a few moments appalled. He believed at first that a magazine had exploded, but, as the dawn was rapidly advancing, he beheld in front of them, where Southern breastworks had stood, a vast pit two or three hundred feet long and more than thirty feet deep. At the bottom of it, although they could not be seen through the smoke, lay the fragments of Confederate cannon and Confederate soldiers who had been blown to pieces.

"A mine breaking the rebel line!" cried Warner, "and our men are to charge through it!"

Trumpets were already sounding their thrilling call, and blue masses, before the smoke had lifted, were rushing into the pit, intending to climb the far side and sever the Southern line. But Colonel Winchester did not yet give the word to his own regiment, and Dick knew that they were to be held in reserve.

Into the great chasm went white troops and black troops, charging together, and then Dick suddenly cried in horror. Those were veterans on the other side, and, recovering quickly from the surprise, they rushed forward their batteries and riflemen. Mahone, a little, alert man, commanded them, and in an instant they deluged the pit, afterward famous under the name of "The Crater," with fire. The steep slope held back the Union troops and from the edges everywhere the men in gray poured a storm of shrapnel and canister and bullets into the packed masses.

Colonel Winchester groaned aloud, and looked at his men who were eager to advance to the rescue, but it was evident to Dick that his orders held him, and they stood in silence gazing at the appalling scene in the crater. A tunnel had been run directly under the Confederates, and then a huge mine had been exploded. All that part was successful, but the Union army had made a deep pit, more formidable than the earthwork itself.

Never had men created a more terrible trap for themselves. The name, the crater, was well deserved. It was a seething pit of death filled with smoke, and from which came shouts and cries as the rim of it blazed with the fire of those who were pouring in such a stream of metal. Inside the pit the men could only cower low in the hope that the hurricane of missiles would pass over their heads.

"Good God!" cried Dick. "Why don't we advance to help them!"