Tap-tap-tap! sounded softly. Dave threw the window up stealthily.
"You, Dan?" he whispered.
"Of course," came the soft answer. "Stand aside. Let me in—-on the double-quick!"
Dave pushed the window up the balance of the way, then stepped aside. Dan Dalzell landed on his feet in the room, cat-like, from the terrace without. Then Dave, without loss of an instant, closed the window and wheeled about in the darkness.
"Hustle!" commanded Dave.
"What about?"
"Get off your uniform! Get into pajamas. Then I'll——-"
Dave's jaws snapped together resolutely. He did not finish, just then, for he knew that Midshipman Dalzell could be very stubborn at times.
"I'll have a light in a jiffy," whispered Dan "I brought back a candle with me."
"You won't use it—-not in here," retorted Dave. "The dark is light enough for you. Hustle into your pajamas."