"That fits in excellently with my idea," Darrin nodded.
"And that would account for the great numbers of mines that the enemy is able to lay hereabouts, and yet not have many of the craft caught by us,"
Lieutenant Fernald continued.
"Exactly," Dave agreed. "Moreover, the mine-layers take on their new supplies at night, and do their resting here at night, and get away from these shoals just before daylight."
"Of course," Fernald agreed. "If they rested here much in the daytime the aircraft would discover and destroy them."
"We"ll both keep at work on our ideas, Fernald," Dave proposed. "Besides, we can take time to find facts to support our theories. Then we can get together and start in the biggest smashing of mine-laying craft on record."
Both paused in their talk to listen to the sudden boom of guns. Judged by the sound and the wind, the firing was some six miles away.
"Lookout there!" Darrin sang out. "Do you see anything?"
"Yes, sir," came the reply from aloft. "It must be the "Reed," sir. She must have gotten into something stiff, for she"s moving sh.o.r.eward at slow speed and firing as fast as she can serve her guns. She"s firing in sh.o.r.eward, sir."
CHAPTER XVI
HITTING CLOSE TO THE SALT TRAIL
"GIVE us a rocket signal if you need help," Dave signalled the attendant mine-sweeper.
Then to the officer of the watch:
"Give us full speed, and we"ll run down to see if the "Reed" has work enough for two of our kind."
A little further south he signalled same orders to the patrol boat that he had given to the mine-sweeper.
Then the "Grigsby" rushed onward as if she scented something of which she did not wish her crew to be deprived.
As soon as Darrin discovered that Dalzell was using his searchlight he ordered the "Grigsby"s" also to be used. Over the waters the bar of light swept until it picked up a sight that made the officers on the bridge gasp for sheer astonishment.
Two submarines, some five hundred yards apart, lay on the surface of the sea.
Strangest part of all, neither craft was serving its guns. Why they neither fought nor dived puzzled the "Grigsby"s" officers until the "Reed"s" guns ceased firing and her blinkers signalled to Dave:
"Don"t fire on them unless I do. They"re helpless."
The "Reed," first to approach the submarines, steamed in between them.
Then as the "Grigsby" raced up, she received this message from Dalzell:
"Wish you would take charge of the nearer submarine. I"ll handle the other."
On both enemy craft, as seen under the searchlight, the German crews had come out on deck. It was clear that they wished to surrender without further loss of life.
So Dave ordered a launch cleared away, with a prize crew armed to the teeth, Ensign Andrews in command.
"You men get as far forward as possible," Andrews shouted to the huddled enemy. "Be careful not to have any weapons about you. We"ll accept you as prisoners of war, but any attempt at treachery will be sternly punished!"
As he spoke the ensign rested one hand on the barrel of a machine gun in the launch"s bow. Instantly the Germans began to move forward, only their four officers remaining near the conning tower.
"Stand by to catch a line and make fast," called the ensign, as the launch, under headway, lay in close.
Though they plainly understood, not one of the German officers made a move to catch a rope. Instead, one of them called to the huddled seamen, two of whom came back to take the line.
Making fast, Andrews stepped aboard, followed by some of his armed crew.
"You are the only officers of this craft?" Andrews demanded.
"Yes," sullenly replied the ober-lieutenant.
"Be good enough to hold up your hands while we search you."
Though their eyes flashed their rage, the German officers raised their hands while a petty officer "frisked" them one after the other.
"None of them armed, sir," was the report.
"Then into the launch with them. Next, order the seamen and engine-tenders aft and search them. The launch will carry about twenty prisoners on the first trip."
Soon the score of prisoners had been delivered aboard the "Grigsby." A second lot was sent over, after which Andrews decided that he could take charge of the remainder on their own craft. He now had force enough with him to keep this unarmed remainder in subjection.
Heading an armed party the ensign went below in the submarine to make an inspection. He had already noted a sh.e.l.l-hole through the hull which had made it impossible for this submarine to dive without drowning the crew.
But he found other matters to interest him. This was a mine-layer craft, and at the present moment she had more than twenty mines on board.
One of Dalzell"s junior officers, searching the other submarine, found her to be a mine-layer, too, but with only two mines on board. This second craft, also, had been pierced through the hull in such fashion that there had been no chance for her to escape by submerging.
On each craft forward a crane had been set up, and still stood. Dan Dalzell"s report, when made, shed a good deal of light on German methods.
The "Reed" had been barely drifting when two submarines had come up within two miles of the destroyer. It was the noise of erecting the cranes that had warned Dalzell"s watch officer of their presence there on the dark sea.
Suddenly, through night gla.s.ses, Dan, who had been called to the bridge, discovered what was taking place. On the quiet waters of this night the two craft had managed to get near enough to each other to attempt to transfer mines from one to the other.
Then it was that the "Reed" had opened fire with her guns, had turned on her searchlight and had rushed in.
As soon as the German commanders found their boats punctured into helplessness they had signalled their surrender.
"But I was glad indeed when I saw you bearing down on us," Dan announced, when he visited his chum a little later. "The enemy had surrendered, but I know enough of German treachery to realize that they might let me drive in close and then try to torpedo me. I needn"t have worried, but of course I could not afford to take chances."
Sending for Boatswain"s Mate Runkle, Dave inquired:
"Do you speak German?"
"I know about six words, sir; not as many as eight."
"Then you are the man for the job, Runkle. Go down among the prisoners that have been sent on board, the seamen, I mean, not the officers. Act as though you were there on duty, but not very busy. Use your six words of German and make English do for the rest. The German sailors won"t understand you, unless some of them speak English. That will be all the better, for as soon as you discover that some of the men don"t know what you are saying you will be able to judge which of those who speak no English are the most stupid, or the most likely to talk and tell us the truth. Spot three or four of these stupid ones, and then bring one of them here to the chart-room."