"Is it possible such monsters can continue to live and carry on their murderous work?" exclaimed Frank.
"Some day Ko-pe-tah will find the way in here," laughed Old Solitary.
"Who is Ko-pe-tah?"
"A Navajo chief who hates Uric Dugan, and has tried to kill him. Twice within two years has Ko-pe-tah brought his braves into these mountains, searching for some access to this valley. The last time he was here, he found the passage by which you entered. Four of the Danites held the passage against a hundred warriors, and the Navajoes were repulsed. But Ko-pe-tah swore he would come again. If he ever gets in here, woe unto the Danites!"
"How did it happen that we came through that passage without being stopped?"
"You were alone, two boys. You were seen, and were allowed to enter, for they knew you could not escape. They made sure of you by letting you walk into the trap."
"But Ko-pe-tah was held out."
"Because he had a hundred warriors behind him, and he would destroy the Danites if he got inside."
This was logical enough, and, at that moment Old Solitary scarcely seemed like a person deranged.
Frank spent some moments in thought, and then asked: