Tom put on a burst of speed, as if attempting to outrace their pursuer. But he was careful to gauge his knots by reports from the sonarscope, in order not to widen the gap between the two craft. There seemed no danger that this would happen, although the Swiftsure raced ahead faster and faster. Still the enemy sub continued to close in like a marauding shark, finally passing Tom's craft.

"Some baby!" Bud muttered respectfully.

The words were hardly out of his mouth when a missile streaked across their bow, in plain view through the Swiftsure's transparent nose. Its foaming wake rocked the jetmarine.

"They're attacking us!" Bud cried out.

Tom slammed shut the turbine throttle, bringing his craft to a gliding halt in the water. At the same time, he switched on the sonarphone.

"Orders to Swift sub!" a voice barked over the set. "Surface and heave to! No tricks, or the next missile will not be across your bow!"

Tom blew his tanks and sent the Swiftsure spearing upward. As the conning tower broke water, Tom and his men swarmed up on deck. Seconds later, a sleek gray enemy submarine knifed into view. Its hatch opened and several men climbed out.

To Tom's amazement, their leader was Samson Narko!

Chow let out a yelp of rage. "Why, you sneakin', double-dyed, bushwhackin' polecat!" the old Westerner bellowed. "We shoulda kept you hawg-tied, 'stead o' lettin' you go free!"

Narko ignored the outburst and raised a megaphone to his lips. "Hand over your cargo and do it quickly!"