The stranger’s rifle had been hurled from his grasp.

He felt himself borne down, and for a moment his struggles ceased.

“Will you surrender?” gritted the leader.

“Never!”

“On, Wildbird, on!”

Suddenly, with a herculean effort, the horseman freed his right arm.

An instant later a knife flashed in his hand.

Descrying a circle in the air it descended with lightning-like rapidity, severing at a single stroke the horse’s bridle.

At the same time the assailants staggered back, leaving the wounded and maddened steed free.

With a snort of defiance it bounded forward sending the baffled men right and left.