"I can go back alone, and I'll send word to the authorities, over the telephone.

Hurry! hurry, or it will be too late!" The boys needed no further urging.

Dick and Tom ran for the flying machine, and soon the explosions of the motor filled the crisp autumn air.

Then all the boys leaped on board.

Dick was at the wheel, and he sent the _Dartaway_ along at a good rate of speed.