," he said to Frank, when they were in the air again.
"You'll hear more of this night's work before you've done, my boy.
There's a deal of gratitude due you. But I'd like to know what those
Dutchmen were up to!"

Five minutes more saw them landed safely at headquarters, and it was
only a few moments before they were in the presence of General
Smith-Derrien. He listened to Greene's brief report in silence.

"There is more to be told of what my passenger and observer did, sir,"
he added, when he had sketched the essential facts. "I will make a
written report of that direct to you."

"Do so," said the general. "You have done very well. Had it not been for
the information we have obtained in this way, the whole headquarters
staff might have been captured. The Germans evidently learned, through
spies, of the orders that had been issued for continuing the retirement,
and had slipped this force through to intercept the staff. I have been
able to turn the tables on them, however. They will have trouble, I
think, in escaping the forces sent against them."

For some time heavy firing had been heard in the direction of the woods
where the Germans had lain. Now this died away. General Smith-Derrien
glanced significantly at a colonel of his staff and permitted himself
the luxury of a smile, a rare one for him in those days of the retreat.

Just then the telephone on his table rang. The nearest officer answered,
listening attentively for a moment.

"Colonel Mewbray using the field telephone, sir," he said to the
general. "It's been connected with our wires here. He reports that the
horse artillery completely surrounded the wood in which the Germans were
quartered, and shelled the woods for ten minutes. After that the Germans
ceased firing, and when we played searchlights a dozen white flags were
shown. The German commander, General von Garnst, surrendered to avoid a
further useless sacrifice of lives."

The general nodded.

"My compliments to Colonel Mewbray," he said. "Ask him to convey my
thanks to Brigadier-General Lannin. The German prisoners will be placed
on trains at once and sent to Paris, through Amiens. The staff will
prepare at once to take the new position as indicated in the order of
to-night. Orderly!"

"Yes, sir!" said a private, stepping forward.

"My motor is to be ready in five minutes."

"Yes, sir."

The orderly went to transmit the order. Then the general turned to Frank
and held out his hand.

"I