"Done themselves in, poor wretches," replied the owner. "They've detonated the warhead of one of their torpedoes.... Either that or a lingering death."

The Captain turned to order speed for fifteen knots. Sir John left the bridge and made his way to the quarter-deck to rejoin his colleagues.

"That apparatus of yours, Mr. Strong," he observed in level tones, "is perfectly satisfactory. How many can you guarantee within a fortnight?"

He paused and laid his hand upon Brian's masterpiece.

"If only you could adapt it for submarine work," he continued, "you would become the greatest humanitarian of the decade—of the century. There would be none of that brutal business we've just witnessed.... Fifty in a fortnight, Mr. Strong? Excellent! Carry on, and let's have the goods."

CHAPTER XXVI

Orders to Proceed

During the next fortnight, Brian Strong kept his augmented staff hard at work. Ninety men were employed in turning out numbers of the apparatus that was to knock the Rioguayan air fleet out of the running. In three shifts the enthusiastic men toiled, Brian personally superintending two shifts a day, while Peter was in charge of the third.

Meanwhile the personnel of the Royal Navy was being strongly increased. Ex-officers and men volunteered and were gladly accepted. The fleet reserve was called up, the R.N.R. and R.N.V.R. veterans of the Great War offering their services in shoals.