He pressed a spring in his desk, and a secret drawer flew open. As it did so, they all uttered a shout of astonishment.
The mystery was soon explained. The Professor’s memory had come back to him with a rush when he opened the drawer for the blotting paper. On the day of the trial trip of the Electric Monarch, it will be recalled, he had been left behind. After the boys’ departure, (as it came back to him, he had begun to feel uneasy about the plans, secure though they seemed to be in the safe.)
He decided to find a better hiding place than the safe even, for them, and with that object in view arose from the lounge and opened the receptacle. Taking out the papers, he placed them in the secret drawer of the desk. Hardly had he done so, however, when an attack of vertigo seized him and he fell unconscious. Now that his memory had come back suddenly, as he seated himself once more at the desk, all became clear.
And so the mystery of the vanished plans was cleared up with satisfaction to all of them. After all, they had wrongfully suspected Hank and his allies, and they were glad to learn that their suspicions had been unfounded.
There is little more to tell. Heiny Dill finally evolved a burglar trap out of his invention, but he makes more money working for the Boy Inventors at High Towers than he does out of his numerous eccentric contrivances. Sam Hinkley returned to Nestorville not long after his invasion of New York, and after he had begged for forgiveness, his father finally gave him the post of night clerk in the hotel, which he fills admirably. Of the fate of Hank and Miles we are already informed.
And so, with Ned Nevins prosperous and happy, and the Boy Inventors broadened and improved by their experiences with the Electric Monarch, we will, for the present, leave them with the best of wishes for their future undertakings. Knowing them to be always on the alert for the latest developments in scientific progress, we are not greatly surprised to learn that their next experimental experiences will be described in a volume entitled, “The Boy Inventors’ Radio Telephone.”
The launching of this Twentieth Century series marks the inauguration of a new era in boys’ books--the “wonders of modern science” epoch. Frank and Harry Chester, the Boy Aviators, are the heroes of this exciting, red-blooded tale of adventure by air and land in the turbulent Central American republic. The two brothers with their $10,000 prize aeroplane, the Golden Eagle, rescue a chum from death in the clutches of the Nicaraguans, discover a lost treasure valley of the ancient Toltec race, and in so doing almost lose their own lives in the Abyss of the White Serpents, and have many other exciting experiences, including being blown far out to sea in their air-skimmer in a tropical storm. It would be unfair to divulge the part that wireless plays in rescuing them from their predicament. In a brand new field of fiction for boys the Chester brothers and their aeroplane seem destined to fill a top-notch place. These books are technically correct, wholesomely thrilling and geared up to third speed.