On the day after the thunderstorm, Hustler Joe was passing through this district when he came upon some miners drilling holes twelve feet or more in depth and preparing for an exceptionally heavy charge.

“You’d better look out or you’ll bring the whole thing tumbling about your ears!” he said, with a sharp glance at one of the men who seemed much the worse for liquor.

A snarl of oaths in various tongues followed him as he turned his back and walked away.

Thirty minutes later every door in the Bonanza fell with a crash, and solid walls of masonry three feet through were torn down as though they were but barriers of paper, so terrible was the explosion that shook the earth.

Hustler Joe was half a mile away. The shock threw him on his face, and for a minute he was too dazed to think. Then he staggered to his feet and rushed blindly forward straight toward the place where he thought the explosion had occurred. At every turn he met fleeing men, coatless, hatless and crazed with terror. Suddenly he came face to face with Bill Somers.

“Good God, man! Where ye goin’? Are ye gone clean crazy?” demanded Bill, clutching Joe’s arm and trying to turn him about.

For answer Hustler Joe wrenched himself free, picked up a half-unconscious miner and set him on his feet; then he dashed forward and attempted to raise a fallen door that had pinned another miner fast.

“Jiminy Christmas! Ye ain’t goin’ ter stay in this hell of a place alone, anyhow,” muttered Bill, bringing his broad shoulder and huge strength to bear on the door. In another moment the imprisoned man was free and in broken English was calling on heaven to reward his rescuers.

The two men did not falter for an instant, though all the while the deadly damp was closing around them. From gallery to gallery they went, warning, helping, dragging a comrade into a possible place of safety, until human endurance could stand it no longer. Exhausted, they staggered into a chamber which the fire damp had not entered.

“We—we’d better git out—if we’re goin’ to,” panted Somers weakly.