"Don't lose sight of him."
"I won't. He seems to be working harder. Now he's stopped. He's trying to push himself into something. He's flat on the ground. There he goes! Feet-first! He's in — completely in!"
"Wait one minute. Tell me if he reappears."
* * *
Harry remained silent, his eyes glued on the spot where the Hindu had disappeared into the side of the building. He could detect no motion.
"Has he returned?" questioned the voice.
"No," answered Harry. "I'm sure he has gained an entrance."
"It is time for you to act," said the quiet tones. "Until to-night it has seemed impossible to effect an entrance into that building. Now it has been done by some one else."
"Shall I enter the way the Hindu went?"
"Yes. But be cautious. Listen to my instructions."