"That is one Black Bear telling another to take to his heels!" was the reply. "You will see Fremont making for that opening in a second. Here he comes!"

Fremont was indeed springing through the opening where the sash had been. The boys saw the renegade clutch at his clothing, saw the cloth hold for an instant, then tear away under the impetus of the boy's movement, and heard Fremont's answer to the call as he struck the ground under the window.

Instead of going through the outer room and leaving the hut by means of the door, for some reason Big Bob concluded to follow the boy through the window. The opening was large enough for the passage of his burly frame, but he was clumsy in getting through, with the result that Fremont was nearly beyond the circle of light when at last he came to the surface outside.

Then the renegade made another mistake, a fatal one. He lifted up his great voice in warning the boy to return, and fired his revolver into the air as a means of intimidation. As he did so, the door of the hut, situated on the east, flew open and the outlaws rushed out, doubtless under the impression that they had been attacked. They left the door wide open, and a red square of light lay on the rain-soaked ground before it.

The only members of the party who did not exit by way of the doorway was the messenger who had identified Fremont. He dashed into the inner room when the cry and the shot came and looked from the window opening, there being no one in the room.

For hours this man, known to his companions as Ren Downs, had been observing the actions of Big Bob with suspicion. When the renegade talked with the prisoner, as he had many times on the way down, Ren sauntered close to the two in a vain attempt to hear what was being said. He doubted the honesty of the big fellow, believing that it was his purpose to break away from the others, himself included, and so escape the necessity of dividing the reward.

Doubting the loyalty of the renegade as he did, it was natural that he should decide that the fellow was planning an escape with the boy. Therefore, when he saw Fremont disappearing from view in the darkness, with Big Bob close after him, he drew his revolver and fired at the renegade. The shot took effect and Big Bob dropped to the ground.

"I hope he's killed him!" Jimmie said, heartily.

"No such luck as that!" Frank exclaimed. "See, the lobster is getting out his own gun!"

Big Bob lay in an awkward pose on the ground, his face and the muzzle of his automatic revolver turned toward the window. The boys almost held their breath as the figure of the messenger appeared, blocking the opening. When they saw what the purpose of the wounded man was they shouted to Downs to warn him, but were too late.