“I think that it has, but I’m not dead sure. As I told you, I received a valuable tip and I want to work on it. Now, we must arrange some kind of a signal. I may be out most of the night, and I want to signal you fellows to join me outside. If I do I don’t want to have to come back inside the building to get you.”
“You may be outside most of the night!” cried Rhodes. “You’ll freeze, Vench.”
“I may be too active to freeze,” grinned the cadet. “Has anyone of you fellows got a long cord?”
“I have a ball of string in my trunk,” Terry offered.
“Fine. Let’s have it.”
Terry procured the ball of string and handed it to Vench. The little cadet looked from one to the other.
“Which of you is the lightest sleeper?” he asked.
“I’m a fairly light sleeper,” said Rhodes.
“All right.” Vench tied the string to the end of Don’s bed and then hid the ball under the mattress. “Now, as soon as the Officer of the Day has made his inspection you drop that ball of cord out of the window and let it hang there. If I want you guys during the night I’ll yank that cord and wake you up by shaking the bed. If I don’t pull it at all during the night pull it up again in the morning. Is that understood?”
“Yes,” the boys nodded, completely mystified.