"Keep that kid still, or throw him down on the next level!" called Spooner over his shoulder. "I expect he'll have an attack of hysterics when we fire the blast."

"I tell you it isn't a missed hole!" cried the boy.

"Don't be a fool," jeered the head trammer.

Steve did not hear him. The boy had started off with a bound. His hat dropped from his head and his shovel fell clattering to the ground. "Come back, I tell you!" shouted Rush.

A few seconds more and he was right upon them. Without wasting further words of warning, he grabbed the contractor, and with surprising strength for one of his build, Steve hurled Spooner far out into the drift, that official bellowing his rage at the indignity.

Steve reached for the powder-man. His hands had just been laid on the man's shoulders when there came a blinding flash, a detonating report, a rending and tearing of rocks, then a shower of ore and stone.

Darkness settled over the drift and all was still.