"Let me look!" begged Mr. Jenks, taking the glass from Tom. An instant later the diamond man exclaimed: "Yes, it's Munson!"
"Then in here with you—quick!" cried Renshaw. "He can't see us yet, and we'll be out of sight in another minute."
The former spirit pulled aside some thick bushes, and pointed to a hole which was disclosed.
"The entrance to the secret cave," he announced. "Slip in all of you."
Tom, after another glance at the man toiling his way up the mountain, entered the cavern. He was followed by the others. Bill was the last to enter, and he replaced the bushes over the entrance.
"At last!" exclaimed Mr. Jenks, as he gazed up at the roof of the dimly-lighted vault in which they found themselves.
"Yes, we're in the diamond makers' secret cave," added Tom. "Now to catch them at work!"
"Come on," advised Bill, in a low tone. "We're not safe yet," and he produced a lantern from some hidden recess, lighted the wick, and led the way. As the others followed they were aware of a subdued noise in the great cavern.
