As he spoke in guarded tones, Tom went softly to the casement and looked out. He could observe nothing, as the night was dark, and the new moon, which had been shining, was now dimmed by clouds.
"See anything?" asked Mr. Gunmore as he advanced to Tom's side.
"No," was the low answer. "I can't hear anything now, either."
"I'll go speak to Mrs. Baggert, the housekeeper," volunteered Mr. Swift. "Perhaps it was she, or she may know something about it."
He started from the room, and as he went Tom noticed, with something of a start, that his father appeared older that night than he had ever looked before. There was a trace of pain on the face of the aged inventor, and his step was lagging.
"I guess dad needs a rest and doctoring up," thought the young inventor as he turned the electric chandelier off by a button on the wall, in order to darken the room, so that he might peer out to better advantage. "I think he's been working too hard on his wireless motor. I must get Dr. Gladby to come over and see dad. But now I want to find out who that was under this window."
Once more Tom looked out. The moon had
