It was thrust into his hand. Jerry stared at the intercepting lines and then at a map of the district.
“Why, the station seems to be located along the shore!” he exclaimed. “Apparently in one of the caves—Crystal Cave I’d judge.”
“That’s the cave where Louise and I were!” Penny exclaimed. “But we saw no shortwave radio apparatus. Only crazy old Skagway who was playing a tune on the stalagmites.”
“All the same, direction finders don’t lie. The broadcast came from Crystal Cave! But that doesn’t mean the station will be there fifteen minutes from now.”
“What’s to be done?” Penny asked. “Can’t the Voice be caught before he has a chance to move his portable outfit?”
“A message already has been sent to Headquarters. Army men should be on their way to the cave now.”
“Jerry, we’re not far from Crystal Cave ourselves!” Penny exclaimed, her eyes dancing with excitement. “Can’t we go there too?”
“We can and will!” Jerry laughed. “But if we expect to catch our friend, the Voice, there’s no time to lose. Come along, girls, if you’re traveling with me.”
CHAPTER
15
AFTERGLOW
Penny sprawled on the grass beside the dying embers of the camp fire. Listlessly, and with very bad aim, she hurled acorns at a brown squirrel chattering overhead.