Joe knew in an instant that he was in combat with a man larger and more powerful than himself, but his own youth and suppleness were in his favor.

Throwing all his strength into the movement, he twisted about and at the same time jumped, so that he managed to wrap his legs about the other man's waist. With another lithe movement he was again upon his back and reaching for his antagonist's throat, at the same time squeezing with all the strength of his powerful young limbs upon the other's ribs.

Back and forth across the narrow confines of the little room they staggered, now one having a temporary advantage, and again the other. Just as Joe was managing to fasten his fingers in at the throat, and the other was hammering terrible elbow blows into his stomach, the bigger man stumbled. As he fell he turned, and his full weight came down upon the lad, almost crushing him.

Joe was not done for yet, however. With the strength of desperation he held on to the other fellow's shirt. He felt something hard and metallic under it, and in a new grasp included that in his fist.

Again the struggle began. Unable to break Joe's grip, the intruder tried to sink his teeth into the lad's wrist. Failing in this, he gave an evidence of his strength by rising, dragging Joe upward with him.

There was an instant of terrible whirling about the room, and then the man landed a smashing blow on Joe's jaw. Still gripping the man's shirt, and the unknown metallic thing beneath it, the lad reeled. The shirt ripped, there was another sharp snap, and the boy fell backward, dazed.

He heard the man run swiftly, almost noiselessly toward the stern of the ship; brilliant and many-colored lights flashed before his eyes—and he knew no more.

There was an Instant of Terrible Whirling about the Room.