dently did not suspect the presence of a stranger, for, though he cast sharp glances into the tangled undergrowth that fringed the house like a hedge, he did not seek to investigate further. He walked slowly on, making a circuit of the grounds. Tom remained hidden for several minutes, and was about to proceed again, when the man reappeared. Then Tom saw the reason for it.
"He's on guard!" the lad said to himself. "He's doing sentry duty. I can't approach the house when he's there."
For an instant Tom felt a bitter disappointment. He had hoped to be able to carry out his plan as he had mapped it. Now he would have to make a change.
"I'll have to wait until night," he thought. "Then I can sneak up and look in. The guard won't see me after dark. But it's going to be no fun to stay here, without anything to eat. Still, I've got to do it."
He remained where he was in the bushes. Several times, before the sun set, the man doing sentry duty made the circuit of the house, and Tom noted that occasionally he was gone for a long period. He reasoned that the man had gone into the mansion to confer with his confederates.
"If I only knew what was going on in there," thought Tom. "Maybe, after all, the men haven't
