The man hesitated. He had been cautioned not to say too much.
“Only few,” he replied evasively. “I show, please you.” And on they went.
They had nearly reached the lights when a man, carrying a lantern, came running towards them.
“Back!” he cried. “Half a minute! Back!”
“What is the matter?” exclaimed Gus in sudden terror.
“Fire blast,” answered Restrepo. He turned and motioned them back.
They lost no time in returning to the entrance. A few seconds later a dull roar was heard, followed by the sound of falling rocks.
“All right now,” said the Spaniard; “no more for an hour.”
“I wouldn’t want to be around when any of these blasts go off,” shuddered Gus. “Might kill a fellow without half trying.”
“You are right,” replied Oliver. “Ever kill any one?” he asked of Restrepo.