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[Illustration: _Slowly and carefully, Motor Matt went about his work watched breathlessly by Carl._]
_Issued Weekly. By subscription $2.50 per year. Entered according to Act of Congress in the year 1909, in the Office of the Librarian of Congress, Washington, D. C., by_ STREET & SMITH, _79-89 Seventh Avenue, New York, N. Y._
No. 14. NEW YORK, May 29, 1909. Price Five Cents.
CHAPTER I. ON THE LEVEE. CHAPTER II. MIXED IDENTITIES. CHAPTER III. DOUBLE-TROUBLE. CHAPTER IV. TRICKED! CHAPTER V. MOTOR MATT'S PROMISE. CHAPTER VI. DASHINGTON DASHED. CHAPTER VII. A HARD STARTER. CHAPTER VIII. A BULLET FROM BELOW. CHAPTER IX. THE WRECK. CHAPTER X. THE UNEXPECTED. CHAPTER XI. A FRIEND FROM THE ENEMY'S CAMP. CHAPTER XII. THE BAG OF DIAMONDS. CHAPTER XIII. A DARING PLOT. CHAPTER XIV. ON THE ROAD. CHAPTER XV. A NEW MAN TAKES A HAND. CHAPTER XVI. CONCLUSION. THE MASKED LIGHT (CONCLUSION). SPANISH CEDAR LOGS. COOKING THE VENISON STEAK. BABY OSTRICHES. MINK FARM IN OREGON.
=Motor Matt=, a lad who is at home with every variety of motor, and whose never-failing nerve serves to carry him through difficulties that would daunt any ordinary young fellow. Because of his daring as a racer with bicycle, motor-cycle and automobile he is known as "Mile-a-minute Matt." Motor-boats, air ships and submarines come naturally in his line, and consequently he lives in an atmosphere of adventure in following up his "hobby."
=Carl Pretzel=, a cheerful and rollicking German boy, stout of frame as well as of heart, who is led by a fortunate accident to link his fortunes with those of Motor Matt.
=Dick Ferral=, a young sea dog from Canada, with all a sailor's superstitions, but in spite of all that a royal chum, ready to stand by the friend of his choice through thick and thin.
=Archibald Townsend=, a wealthy though eccentric gentleman, who owns a remarkable submarine boat on which our friends have seen various adventures in the past.
=Cassidy=, mate of the submarine _Grampus_.
=Whistler=, } =Jurgens=, } a trio of rogues bent upon gaining possession of a prize. =Bangs=, }