It was when Tom, preceding Ned, walked out of one of the bedrooms into the main hall that the young inventor gave another perceptible start and uttered a low exclamation.
"What's the matter now?" asked Ned, with half a laugh. "See another moving panel?"
"No, but, somehow, Ned, I feel as if we were being spied upon! Don't you?"
"Spied upon! What do you mean?"
"Well, when I came out of that room," and Tom pointed back to it, "I had a distinct feeling that eyes were following me. Didn't you ever have such a feeling?"
"Yes; but not now. I think you're just over-worked and nervous. You did most of the driving, and with that and the storm and getting bogged, it's no wonder you're seeing things."
"Well, maybe that's it," agreed Tom, but his heart did not appear to be in what he was saying. "I am tired. I'll be glad when we have had something to eat and can turn in for a good night's sleep."
"Boy, you let loose an earful that time!" chuckled Ned.
He saw that Tom was flashing his light back into the room they had just quitted and he followed his chum's example. But nothing was seen save the same dismal ruin that confronted them on every side.
Going downstairs behind Tom, when Ned reached the landing where the young inventor had said he thought he saw a panel move, he was suddenly conscious of the same feeling that Tom had mentioned—that of unseen eyes staring at him.