"There were two sets of wires, sir," he said, "so that if one had not worked, the other would. I looked very carefully along the walls for other wires, but didn't find any."

The captain dismissed him, with a word of approbation, and then gave orders for the submarine to get under way. This was done, but Captain Clendenin had no intention of rising directly to the surface. The water chambers were pumped out very slowly, and, as the boat gradually rose, it was steered slowly back and forth across the face of the gates, and men were stationed at the portholes to look for any indication of other wires. They found none, but were able to see where the dynamite charges had been placed. Evidently the walls had been charged with enough of high explosives not only to derange the machinery but possibly to blow it into fragments.

The men in the submarine shuddered as they thought of the awful catastrophe that would have occurred, and thanked the Providence that had enabled them to avert it. Bert became a veritable hero to all on board. Of course, by this time, the crew had gained a pretty good idea of how matters stood, and had as strong an admiration for him as had the officers. They were all picked men, chosen for their intelligence and bravery, and were therefore well fitted to appreciate these qualities when found in others. And Bert's exploit was after their own heart.

He had free run of the ship, and had learned the uses of most of the ingenious devices that were scattered everywhere about the boat. Accordingly, as he now stepped into the control room, he saw at a glance that they were nearing the surface of the water, being at this moment only twenty feet beneath it.

The gauge indicated less and less depth, and suddenly a burst of sunshine entering the porthole told Bert that they were at the surface. The hatchway was thrown open and he ascended to the deck. The pure, sweet air was very grateful after the somewhat confined atmosphere of the submarine, and Bert drew in great breaths of it. Pretty soon Lieutenant Warren joined him on the little platform and shared with him the beauty of the morning.

"It certainly gets pretty close in here at times," he remarked. "Once we got stuck on the bottom and had all sorts of a time getting off. Our reserve supply of air was used up and we all thought we'd suffocate, sure. But we managed to get loose from the wreck we were mixed up with, just in time, and I don't believe that I ever enjoyed the sight of the blue sky as I did then. It was a narrow squeak, and no mistake."

"I should say it was," answered Bert, and then, after a pause, he asked: "But where are we bound for, now, Lieutenant? What's the next move in the game?"

"Why, we'll get news of this plot to the Canal authorities and the War Department, as soon as possible, and then it will be up to them to act as they see fit. You've done your part and we've done ours, and they in their wisdom can decide the future policy of the nation."

"But what do you think that will be?" queried Bert. "They'll declare war, now, won't they?"

"That's a hard question to answer," mused the other, "but it's my private opinion that the whole matter will be hushed up. You may be sure that those engaged in this affair have covered their tracks very skillfully, and it would be practically impossible to prove that they were accredited agents of the Japanese Government. And in a case of that kind, the world requires more than mere suspicion, you know."