Glancing from one group to the other, the boys rose to their feet with exclamations of surprise.
"Well, Great Frozen Hot Boxes!" cried Jimmie. "How did you get here, Mackinder?"
A man from the small group behind the officer stepped forward, smiling.
"I was picked up by the fishing boat you probably saw when I swam away from the submarine you captured. They transferred me to this craft. We have since been looking for you."
"Well, I"m glad to see you, anyway," returned the lad. "But you couldn"t prevent our leaving Holland, even if you did try good and hard. Have you found that package yet?"
The smile quickly faded from the face of the other.
"No, I haven"t," he answered in a low voice. "I find that you boys have gotten me into a lot of trouble, too."
"Trouble?" puzzled Ned. "How have we done that?"
"By secreting that package," explained Mackinder. "You see, I was detailed to duty on the Holland frontier. When I saw that package, and knew that you had recently come from the German lines, I a.s.sumed, of course, that it contained information for the German submarine that has been causing so much havoc amongst the English shipping. Without waiting for orders, I tried to follow you and gain possession of the object. Now it seems I am disobeying regulations by absenting myself from my post of duty without leave. Further, I was seen aboard or coming from a German vessel. Hence circ.u.mstances look bad for me. I"m due for a court martial as soon as we land at Margate, which must be close aboard by now."
All were startled to hear a groan escape the man lying upon the mattress.
He had raised himself upon one elbow.
"Oh, Robert!" he cried. "Not that!"
"Tom!" gasped Mackinder. Soon the two men were shaking hands at a great rate, tears in their eyes.
"Boys," Mackinder announced at length, "I must introduce my brother Tom."
"We have had the pleasure of meeting the gentleman," stated Ned. "In fact, we owe our lives to his kindness."
"But, see here," demanded Jimmie, stepping forward, "this needs an explanation. Which one of you fellows was at the little cabin on the Holland border?"
Tom Mackinder smiled, in spite of the pain of his crushed leg. He turned his glance toward his brother, whose hand he held.
"We both were there, Jimmie," he said. "I took the package from the window. You see," he continued, "it contained plans of my submarine, with which you are familiar. I tried to sell the plans to Germany, but found they had beaten me. So upon my return trip I slipped the package into your baggage, thinking to escape search and detention at the border. I have it here now."
As he ceased speaking he drew from his pocket the same flat package the boys had seen before.
"Hurrah!" cried Jimmie. "Now we can explain how your brother came to be captured by the Germans, and how under his direction we stole the other "U-13" and escaped from Helgoland."
"If what you say is true, young man," put in the officer, "the antic.i.p.ated court martial may never convene."
"We can prove it!" protested Jimmie vigorously.
"Then we have solved the Mystery of the "U-13"!" declared the officer, with evident relief.
"And now we"ll head for the little old U. S. A. and peaceful neutrality!"
was Jimmie"s joyful comment.
"But you"ll first arrange to care for your share of the cargo aboard my boat," interposed the injured Mackinder.
He would not entertain any of the objections raised by the boys, but insisted that they share in the treasure which had been recovered from the ocean"s grasp.
A few days later as the boys watched the chalk cliffs of Dover slip away into the eastern horizon Jimmie turned from the rail of the steamer upon which they had taken pa.s.sage.
"Good by, England, and good by the Mackinders," he said. "I"m glad we are out of the war zone at last and that we solved the Mystery of the "U-13"."
THE END
BOY SCOUT SERIES By G. HARVEY RALPHSON
Just the type of books that delight and fascinate the wide awake boys of today. Clean, wholesome and interesting; full of mystery and adventure.
Each t.i.tle is complete and unabridged. Printed on a good quality of paper from large, clear type and bound in cloth. Each book is wrapped in a special multi-colored jacket.
1....Boy Scouts in Mexico; or, On Guard with Uncle Sam 2....Boy Scouts in the Ca.n.a.l Zone; or, the Plot against Uncle Sam 3....Boy Scouts in the Philippines; or, the Key to the Treaty Box 4....Boy Scouts in the Northwest; or, Fighting Forest Fires 5....Boy Scouts in a Motor Boat; or Adventures on Columbia River 6....Boy Scouts in an Airship; or, the Warning from the Sky 7....Boy Scouts in a Submarine; or, Searching an Ocean Floor 8....Boy Scouts on Motorcycles; or, With the Flying Squadron 9....Boy Scouts beyond the Arctic Circle; or, the Lost Expedition 10....Boy Scout Camera Club; or, the Confessions of a Photograph 11....Boy Scout Electricians; or, the Hidden Dynamo 12....Boy Scouts in California; or, the Flag on the Cliff 13....Boy Scouts on Hudson Bay; or, the Disappearing Fleet 14....Boy Scouts in Death Valley; or, the City in the Sky 15....Boy Scouts on Open Plains; or, the Round-up not Ordered 16....Boy Scouts in Southern Waters; or the Spanish Treasure Chest 17....Boy Scouts in Belgium; or, Imperiled in a Trap 18....Boy Scouts in the North Sea; or, the Mystery of a Sub 19....Boy Scouts Mysterious Signal or Perils of the Black Bear Patrol 20....Boy Scouts with the Cossacks; or, a Guilty Secret
BOYS PRIZE LIBRARY
A desirable a.s.sortment of boys" books. All books in this series are copyrighted. Printed on a good quality of paper from large clear type.
Cloth bound. Jacket printed in colors.
1. At Whispering Pine Lodge Leslie 2. Boy Inventors" Diving Torpedo Boat Bonner 3. Boy Inventors" Flying Ship Bonner 4. Chums of the Campfire Leslie 5. Jack Winter"s Campmates Overton 6. Jack Winter"s Gridiron Chums Overton 7. Motor Boat Boys Mississippi Cruise Arundel 8. Phil Bradley"s Winning Way Boone 9. Radio Boy"s Cronies Whipple 10. Rivals of the Trail Leslie 11. Young Oarsman of Lake View Bonehill 12. Young Hunters in Porto Rico Bonehill
VICTORY ALGER SERIES
A select a.s.sortment of books by Horatio Alger, Jr. Printed on a good quality of paper and bound in cloth. Each book wrapped in a decorative jacket printed in colors.
1. Adrift in New York; or, Tom and Florence Braving the World 2. Andy Grant"s Pluck and How He Won Out 3. Driven from Home; or, Carl Crawford"s Experience 4. In a New World; or, Among the Gold Fields of Australia 5. Jed, the Poorhouse Boy; or, From Poverty to t.i.tle 6. Luke Walton; or, the Chicago Newsboy 7. Risen from the Ranks; or, Harry Walton"s Success 8. Shifting for Himself; or, Gilbert Greyson"s Fortune 9. Sink or Swim; or, Harry Raymond"s Resolve 10. Store Boy; or, the Fortunes of Ben Barclay 11. Tony, the Tramp, or, Right is Might 12. Young Explorer; or, Among the Sierras