Readers of the first volume in this series, “The Submarine Boys on Duty,” remember how Jack Benson and Hal Hastings strayed into the little seaport town of Dunhaven one hot summer day, and how they learned that it was here that the then unknown but much-talked-about Pollard submarine was being built. Both Jack and Hal had been well trained in machine shops; they had spent much time aboard salt water power craft, and so felt a wild desire to work at the Farnum yard, and to make a study of submarine craft in general.

How they succeeded in getting their start in the Farnum yard, every reader of the preceding volumes knows; how, too, Eph Somers, a native of Dunhaven, managed to “cheek” his way aboard the craft after she had been [pg 015] launched, and how he had always since managed to remain there.

Our same older readers will remember the thrilling experiences of this boyish trio during the early trials of the new submarine torpedo boat, both above and below the surface. These readers will remember, also, for instance, the great prank played by the boys on the watch officer of one of the stateliest battleships of the Navy.

Readers of the second volume, “The Submarine Boys' Trial Trip,” will recall, among other things, the desperate efforts made by George Melville, the capitalist, aided by the latter's disagreeable son, Don, to acquire stealthy control of the submarine building company, and their efforts to oust Jack, Hal and Eph from their much-prized employment. These readers will remember how Jack and his comrades spoiled the Melville plans, and how Captain Jack and his friends handled the “Pollard” so splendidly, in the presence of a board of Navy officers, that the United States Government was induced to buy that first submarine craft.

After that sale, each of the three boys received, in addition to his regular pay, a bank account of a thousand dollars and ten shares of stock in the new company. Moreover, Messrs. Farnum and Pollard had felt wholly justified in [pg 016] promising these talented, daring, hustling submarine boys an assured and successful future.

Jacob Farnum at last looked up from the final reading of the telegram in his hands. Captain Jack Benson's gaze was fixed on his employer's face. Hal Hastings was looking out of a window, with almost a bored look in his eyes.

“You young men wanted action,” announced Mr. Farnum, quietly. “I think you'll get it.”

“Soon?” questioned Jack, eagerly.

“Immediately, or a minute or two later,” laughed the shipbuilder.

“I'm ready,” declared Captain Jack, rising.