had a risky venture ahead, taking those two inexperienced passengers over the hostile lines, possibly amidst showers of exploding shrapnel shells. But it was not this that weighed so heavily on his spirits. He felt almost like a criminal at leaving Jack behind.
"All right; let her go!" he announced grimly.
There came a sudden whirring sound. Then the loud hum of the motors chimed in, and the big Caudron machine started off.
"Good-bye, Tom! Good-bye, Bessie!" Jack was heard saying, although the noise of the plane almost drowned his voice.
Faster they went now, as the machine gained momentum. Tom paid strict attention to his business of pilot. At just the proper time he must elevate the forward rudder; which would cause the plane to leave the ground and start upward at a sharp angle.
Jack stood gazing after the object that was quickly growing more and more indistinct in the dim moonlight, gazing with a strange heaviness in the region of his heart. He had to shut his teeth firmly together to conquer the momentary weakness that threatened to overpower him. But his resolution remained master of the field.
"If only he gets them safely across," Jack muttered to himself, when he could no longer
