Half a dozen men leaped out to follow the discomfited assailants, unheeding the stern orders of Dave Farrell. They had scarcely showed themselves when four of them went down, for, although so many had fallen, the enemy was not yet beaten, but had paused for breath before a new attack, shuttered by the band in the timber on either flank.

“Spread out there on the left and cover the corral,” cried Dave. “They’ll stampede the horses next.”

The order did not come too soon, for the party who moved to the left in obedience found themselves face to face with forty or fifty Indians creeping up toward the corral. A hand-to-hand struggle began, and as both sides were reinforced, a battle royal began between the corral and the prairie. In these wood battles the hand and eye must be trained to take in every incident and change in the scene, for it is impossible to say from what point a blow may come. The weapons are deadly, the revolver, knife and hatchet playing the principal part. Neither party would give way an inch now, and it was impossible to say who would conquer, when a shrill, peculiar whistle was heard high above the tumult. Instantly the assailants gave way, and were seen scattered about the prairie in headlong flight, leaving their dead and wounded gasping upon the sod. The trappers would have followed, but Dave would not permit it.

“Enough has been done, boys,” he cried. “We have given them a lesson which they will not soon forget, and I doubt if they will try their powers on us again. But, what made them give up so suddenly? They seemed to be holding us well when they broke away.”

“It was nip and tuck,” replied one of the men. “Durned ef I understand it.”

“I heerd a whistle,” replied another. “Thet’s all I know about it, and they quit on that.”

“I heard the signal too,” said Dave. “Two or three of you fellows run out and see what they are doing.”

Volunteers were plenty, and picking their way carefully through the dead and dying, they saw that the marauders were already in the saddle and headed for the foot-hills. The horse-guards had kept the animals well together, and they were not impeded in their flight. But, hardly had they disappeared when the scouts saw another line of horsemen streaming out from a distant pass, heading toward the timber, and they came back to report.

“A large force, boys?” demanded Dave.

“Nigh a hunderd, Cap.”