"I guess that's sensible enough," nodded Mr. Farnum. "Well, get aboard, boys. Lieutenant Danvers will be out by ten o'clock. Don't lie awake to-night, thinking too hard of what's before you."

"Don't you expect us to, sir," smiled Captain Jack. "We need our sleep to-night, if we've got such work ahead of us. It's big, work, sir."

"Big enough," nodded Jacob Farnum. "If we come out of this big official test with all the points of the game, then Uncle Sam is likely to buy all the submarine boats we can make for a couple of years to come—and our fortunes will be made—yours, too, boys!"

This talk of the boys' fortunes being at stake was not a matter of idle words. Jack, Hal and Eph well understood that, if they came out successful, they would also be at least moderately well off. Messrs. Farnum and Pollard were not of the kind to be niggardly in giving rewards fairly won.

CHAPTER VI

JUDAS CO. INTRODUCE THEMSELVES:

Groton Bay, as every student of geography knows, is a nearly landlocked, well sheltered body of water, some seven miles long and three wide. At the mouth of the Groton river stands Colfax, a city of more than thirty thousand inhabitants.

This was about all that the submarine boys knew of their destination, until they arrived in the bay on the afternoon of the day after they left, Dunhaven.

Their run down had been a continuous one. Jack had had Biffens to relieve him at the wheel, while Mr. Farnum had helped Hal in the engine room. Besides, Besides, Lieutenant Danvers had stood a few tricks at the wheel.

While Jack came in the "Benson," which carried the two remaining loaded torpedoes, Eph had handled the "Hastings," with Ewald as relief. Williamson had handled the engines of the latter boat. David Pollard standing relief engine room watch.