“That’s a massive brain of yours, Billy,” complimented Frank.

“Oh, pshaw, Frank; you’d have thought of it later,” protested the reporter, delighted nevertheless at having gained the young leader’s approbation.

“Now then,” said Ben, when all was declared ready, “this thing is one man’s job. Old man dynamite don’t like a crowd around when he celebrates. You boys stay back here.”

In view, however, of the danger of an attack by the aroused serpents he consented finally to allow Frank to accompany him down the tunnel to the chasm. The two companions,—the seasoned, toughened man and the brave boy,—set forth on their dangerous mission in silence. It was no time for talking. All their plans were agreed upon. Ben was to lower the sticks of dynamite, cautiously over the brink of the serpent-filled abyss and Frank, with his rifle ready for emergencies, was to stand behind him ready to drop any of their scaly enemies that might protest against the invasion of their long undisputed kingdom.

A creepy feeling came over Frank as their candles showed them that they were hard upon the chasm. The hour of the experiment upon which so much hung was at hand. Ben without the quiver of an eyelid, held up a hand to enjoin absolute silence and crept on his belly to the edge of the pit. So far everything had gone well. There was not a sign, but the peculiar odor of musk that filled the air, that they were on any more dangerous task than the placing of an ordinary placer mine blast. Frank, as he watched Ben proceed to work, realized the purpose of a long bit of heavy board the prospector had brought with him.

Ben stuck one end of the board, which was about six feet long, out about two feet beyond the edge of the pit brink, having previously rigged the wires into a notch he had cut in its outer end. Frank saw at once that this was to obviate any danger of the giant powder striking the edge of the chasm as it was lowered and causing a premature explosion, which would certainly have cost them their lives.

All went well till Ben had lowered possibly sixty feet of wire and then there came a loud angry hiss, which soon grew into a sound of furious reptilian rage that reverberated in the narrow tunnel, like waves breaking on a beach. As Frank heard, with a chill of horror, this indisputable evidence that at that very moment the dynamite was brushing the soft scaly backs of a nest of huge white serpents, his blood ran cold.

Suddenly, Ben straightened himself up with a shout.

“All set!” he roared, and, leaping to his feet, started running like a jack rabbit back down the tunnel toward the battery-box. As if his cry had been a signal, an enormous white head, with the same sightless eyes that had distinguished the serpent Billy escaped from, arose from the edge of the pit with an angry hiss. In its snow-white head, its red tongue darted in and out like a flash of livid flame.

“Run Frank! Run for your life!” shouted Ben, as the loathsome monster hurled itself out of the pit and started after him. Hardly knowing what he did, Frank fired point-blank at the creature in a perfect spasm of disgust and fear. He saw it writhe in great convulsions and as if in a nightmare, witnessed the awful spectacle of two of its enraged brethren wriggle toward him at lightning speed over the edge of the pit. He turned to run but stumbled. As he fell he felt himself picked up by Ben Stubbs and fairly dragged over the ground up the tunnel to where the battery stood. He saw Ben bend over the box and shout back into the tunnel to where the others were: “Lie flat everybody!”