"Must be a big one," commented Dave.
"A crackerjack," said Howard. "We'll go down and see it, after a while."
"Keep on with your story," urged Sam.
"Needn't tell you how thankful I was for getting on solid ground again," went on Fenton. "When my nerves stopped shaking I looked about, and found——"
"Blackberries?" said Bob.
"Yes," laughed the other, "and, I might as well tell you, traces of silver in the rocks."
"Of silver?" echoed the boys, in surprise.
"Yes, sir! I've studied a bit on those subjects. Told you I was going to take a course in college—remember, Bob? Well, it didn't take long for me to be satisfied that there was plenty of it, too."
"Gee!" said Sam.
"Mighty interesting," murmured Bob, while Dave stood straight up and stared at the rocks.