"Zeppelin, man! What the deuce do you mean? Where is it?"

"Up there, sergeant. I can hear it quite plainly now."

"By Jove, so can I!"

The next moment the sergeant was back in the guard-room. From thence he dashed into the orderly-room, and knocked at the inner door, where the orderly officer for the night was on duty.

"Come in," cried the officer in answer to the knocking. Then, as the sergeant, all puffed with his exertion, entered and saluted, he said:

"What's the matter, sergeant?"

"Zeppelin approaching from over the German lines, sir. Hadn't we better 'phone to the anti-aircraft guns, and the searchlights to pick up the raider before he bombs the place?" for to the sergeant's mind, visions of falling bombs and terrific explosions were present.

"Zeppelin?" laughed the orderly officer.

"Yes, sir. I can hear the engines as plainly as possible outside."

"No, you're mistaken. It's the 'Gertie' returning. She's been out on secret service work behind the German lines. I've been expecting her for a couple of hours. Not a word of this to the men, now. I am expecting a secret service man back before dawn, and the 'Gertie's' been to fetch him. Picked him up at some secret place in the dark, far behind the enemy's lines."