"But I must go back now and work on my gyroscope invention," said Mr. Swift when about two hours had been spent on the lake. "I am making good progress with it."
"You need a vacation," decided Tom, "I'll be ready to take you and Ned in about two weeks. He will have two weeks off then and, we'll have some glorious times together."
That afternoon Tom put some new style spark plugs in the cylinders of his motor and found that he had considerably increased the revolutions of the engine, due to a better explosion being obtained. He also made some minor adjustments and the next day he went out alone for a long run.
Heading up the lake, Tom was soon in sight of a popular excursion resort that was frequently visited by church and Sunday-school organizations in the vicinity of Shopton. The lad saw a number of rowing craft and a small motor-boat circling around opposite the resort and remarked: "There must be a picnic at the grove to-day. Guess I'll run up and take a look."
The lad was soon in the midst of quite a flotilla of rowboats, most of them manned by pretty girls or in charge of boys who were giving sisters (their own or some other chap's) a trip on the water. Tom throttled his boat down to slow speed and looked with pleasure on the pretty scene. His boat attracted considerable attention, for motor craft were not numerous on Lake Carlopa.
As our hero passed a boat, containing three very pretty young ladies, Tom heard one of them exclaim:
"There he is now! That's Tom Swift."
Something in the tones of the voice attracted his attention. He turned and saw a brown-eyed girl smiling at him. She bowed and asked, blushing the while:
"Well, have you caught any more runaway horses lately?"
"Runaway horses—why—what? Oh, it's Miss Nestor!" exclaimed the lad, recognizing the young lady whose steed he had frightened one day when he was on his bicycle. As told in the first volume of this series, the horse had run away, being alarmed at the flashing of Tom's wheel, and Miss Mary Nestor, of Mansburg, was in grave danger.