"Oh, we'll take good care of him," said the lad; but he could not help worrying, though he tried not to let his father see the strain which he was under.

It was some days after this, and lacking about a week until the meet was to open, when a peculiar thing happened. Tom had given his Humming-Bird a tryout one day, and had then begun to make arrangements for taking it apart and shipping it to Eagle Park. For he would not fly to the meet in it, for fear of some accident. So big cases had been provided.

"I'll take it apart in the morning," decided Tom, as he went to his room, after seeing to the burglar alarm, "and ship her off. Then Mr. Damon and I will go there, set her up, and get ready to win the race."

Tom had opened all the windows in his room, for it was very warm. In fact it was so warm that sleep was almost out of the question, and he got up to sit near the windows in the hope of feeling a breeze.

There it was more comfortable, and he was just dozing off, and beginning to think of getting back into bed, when he was aware of a peculiar sound in the air overhead.

"I wonder if that's a heavy wind starting up?" he mused. "Good luck, if it is! We need it." The noise increased, sounding more and more like wind, but Tom, looking out into the night, saw the leaves of the trees barely moving.

"If that's a breeze, it's taking its own time getting here," he went on.

The sound came nearer, and then Tom knew that it was not the noise of the wind in the trees. It was more like a roaring and rumbling.

"Can it be distant thunder?" Tom asked himself. "There is no sign of a storm." Once more he looked from the window. The night was calm and clear—the trees as still as if they were painted.

The sound was even more plain now, and Tom, who had sharp ears, at once decided that it was just over the house—directly overhead. An instant later he knew what it was.