CHAPTER XXII
A STARTLING MESSAGE
"Wake up, Frank!"
Frank, roughly shaken by Bob Upton, sat up in bed. He rubbed his eyes drowsily, and for a moment all the strange happenings of the previous night seemed like some dream.
Then Frank recalled reaching the school about ten o'clock in the morning, when all the students were in their classes, of reaching his room unobserved, lying down on his bed in his clothes to rest and collect his thoughts, and of dropping into a nap.
"I say," hailed Bob excitedly, "where in the world have you been?"
"It's a long story," explained Frank with a prodigious yawn and stretching himself. "You wouldn't believe it if I told it to you. Have I been missed?"
"Missed?" echoed Bob, almost in a shout. "The head monitor sat up for you all night. The gar-
