At 3:15 a. m., July 30, Pleasants lit the fuse of the mine and mounted the parapet to see the results of his regiment’s work. The explosion was expected at 3:30 a. m. Minutes passed slowly by, and the men huddled behind the lines grew more apprehensive. By 4:15 there could be no doubt but that something had gone wrong. Two volunteers from the 48th Regiment (Lt. Jacob Douty and Sgt. Harry Reese) crawled into the tunnel and found that the fuse had burned out at the splice. They relighted it and scrambled to safety. Finally, at about 4:45 a. m., the explosion took place. The earth trembled as men, equipment, and debris were hurled high into the air. At least 278 Confederate troops were killed or wounded in the tremendous blast, and 2 of the 4 guns in the battery were destroyed beyond repair. The measurements of the size of the crater torn by the powder vary considerably, but it seems to have been at least 170 feet long, 60 to 80 feet wide, and 30 feet deep. The awesome spectacle of the mine explosion caused a delay in the Union charge following the explosion. Removal of obstructions between the lines caused further delay. Soon, however, an advance was made to the crater where many of the attacking force paused to seek shelter on its steep slopes or to look at the havoc caused by the mine. The hard-pressed Confederates rallied quickly and soon were pouring shells and bullets into their opponents. Union reinforcements poured into the breach; but, instead of going forward, they either joined their comrades in the crater or branched out to the immediate right and left along the lines. By 8:30 that morning a large part of the IX Corps had been poured into the captured enemy salient. Over 15,000 troops now filled and surrounded the crater. By prompt action and determined effort the Confederates had stopped the attack. The attention of three batteries was soon directed on the Blue-clad men in the crater. Repeated volleys of artillery shot and shell raked the huddled groups of increasingly demoralized men. In addition, mortars were brought to within 50 yards of the crater and started to drop shells on the soldiers with deadly effect. Successful as these devices were in halting the Union advance, Lee was aware that an infantry charge would be necessary to dislodge the enemy. By 6 a. m. an order had been sent to General Mahone to move two brigades of his division from the lines south of Petersburg to the defense of the threatened position. Then Lee joined Beauregard in observing the battle from the Gee house, 500 yards to the rear of the scene of strife. [Illustration: _Maj. Gen. William Mahone, Confederate leader at the Battle of the Crater._ Courtesy, National Archives.]