Jack was assigned, in fulfillment of his ambition to be a “wireless man.”

Nor can we do more here than to hint at the contents of the second volume. This was called “The Ocean Wireless Boys and the Lost Liner,” and set forth the fate of the Tropic Queen. In this book we found Jack and his inseparable chum steadily progressing in their chosen professions, and also met several other characters, all of whom had an important bearing on the events of the boys’ lives. Mr. Jukes took formal recognition of the part Jack played in the disaster that overtook the Tropic Queen, and inwardly resolved that his heroism and devotion to duty had made him a lad worth watching.

Still a third volume followed, describing the boys’ further adventures. In the “Ocean Wireless Boys of the Iceberg Patrol,” much interesting information about the manner in which the ocean lanes are guarded from the white menace of the north, was given. The boys shared in many thrilling adventures also, and ended by discovering something that an expedition, at the head of which was Jack’s Uncle Toby, had almost lost through the tricks of a band of hard characters.

The fourth book setting forth their doings was called “The Ocean Wireless Boys and the Naval Code.” Captain Simms of the U. S. N., after devising a novel code for the use of this government, through the machinations of a band of daring rascals, found himself robbed of it. Wireless played a big part in the recovery of the documents in the long run, Jack acquitting himself to the delight of the naval officials and the government by his work in this connection. Some of the miscreants, whose tricks Jack had helped to frustrate, were sent to prison but others got free. These latter the boys, though they little suspected it, were destined to meet again.

Blinded, choked and with a red mist before his eyes, and in his ears the roar of waters, Jack fought the undertow of the retreat of the giant wave with all his strength. All at once he felt some heavy object hurled against him.

The force of the collision almost knocked what little breath remained in his body out of his lungs. Instinctively he reached out for whatever it was that had struck him.

It was a human body.

The boy had hardly realized this before he found himself flung, panting and gasping, down upon the deck. Thanks to the stays of the foremost of the Sea Gypsy’s two masts, against which the retreating wave had pitched him, he had not been drawn overboard. Instead, as the pressure of water relaxed, it had dropped him and the mute burden he had clasped, to the deck.

For a few minutes Jack lay there panting, too much exhausted to exert a muscle or limb. The unconscious form hurtled against him by the swirling waters lay at his side. It was too dark for Jack to see then who it was, or if life remained in the motionless figure. By-and-by, as his strength came back, he got to his feet and dragged the limp form to a cabin. It proved to be the one which the great wave had swept from Jack so unceremoniously. Luckily, although the seas were thundering mountains high about the laboring yacht, none like that first terrific comber assailed her.

Steadying himself on the rocking floor with much difficulty, Jack fumbled for the electric switch. He found it at last and let on a flood of light. The radiance shed itself on a pale face with a deeply slashed forehead that lay at the boy’s feet.

“It’s Billy,” choked the boy. He got on his knees by Raynor’s unconscious form and gently raised his chum’s head. It fell back limply. A blood-chilling thought surged through Jack and he grew as white