"Time to get ready," said Mr. Temple, looking at his watch. "And, remember, the very first thing you must try to do is to get into their radio station and call me. Day or night, the men here will be watching for your signal and will call me. I'll be mighty anxious about you. So remember."
"We shall call you, sir," said Jack, as the boys moved away. "And don't worry. I'm sure we'll come out all right."
CHAPTER XVI
A SOUND IN THE SKY
"Good-bye, Tom."
"S'long, Jack."
"Keep a watch for our signal. We'll call you."
"I will that. An' if it's in trouble you are, Dave an' me'll be ridin' just as fast as we can to help you. Wish you'd let me go 'long. I'm half minded to follow you."
"No, no. We'll stand our best chance alone. They won't suspect we're other than a bunch of wild young fellows out for adventure."
Tom grumbled, but the force of the reasoning was apparent to him. They leaned from their horses for a last firm handclasp, then Jack rode on to join Bob and Frank who sat on their horses some distance ahead.